As I noted in my immediate follow-up to Apple's fall 2021 "California Streaming" event, the charging standards situation with the company's mobile and computing device line-up has now become completely untenable.
Let's review all the different ways you can juice up your Apple devices.
Look what a mess we have
Introduced in 2012 with the iPhone 5 as a replacement to its legacy 30-pin connector, the Lightning connector can transfer both power and data. It has about a 30W capacity (the upper end isn't known, but the maximum speed the iPhone charges is about 18W, iPads with Lightning charge higher) and can transfer data at the upper-end of the USB 2.0 standard, around 480Mbps/60MBps per second. Lightning is currently used on all iPhone models, the entry-level 9th-generation (and legacy) iPads, Apple Magic Mouse, legacy Apple Pencils, and for wired charging of AirPods cases.
The industry-standard connector is used with multiple Apple products for charging using different data transfer technologies. It includes current models of the iPad Air, iPad Mini, iPad Pro, and the current generation of MacBooks. For charging, Apple uses the USB Power Delivery (PD) standard. It is an industry-standard open specification that provides high-speed charging with variable voltage up to 20V using intelligent device negotiation up to 5A at 100W. It scales up from smartphones to notebook computers, provided they use a USB-C connector or a USB-C power controller on the client and host. Data transfer using USB-C connectors, and Apple products vary, as the company uses USB 3.0, which can transfer at about 5Gbps/640MBps, or 10Gbps using USB 3.1, and Thunderbolt 3, which is a superset standard developed by Intel and Apple, which has a maximum transfer rate of 40Gbps. Older models of iPad Pro (2018-2020) use USB 3.0, whereas the 2021 M1 iPad Pro and all current M1 MacBooks use Thunderbolt.
The round magnetic connector introduced with the iPhone 12, which is present on the entire iPhone 13 line, is a superset of the Qi standard, which has a maximum charging speed of 15W, slightly less than Lightning. Because it is Qi-compatible, it works (without magnetic attachment, strictly as a pad) with the wireless charging standard introduced since iPhone 8, with AirPods cases and Android phones, at slower charging speeds. MagSafe has no provision currently for data transfer; it is strictly a charging technology. While it operates similarly to the Apple Watch connector, it is much larger in circumference and doesn't work with the Apple Watch.
This is the round magnetic connector introduced with Apple Watch in 2015. While it operates similarly to MagSafe, it is much smaller in circumference and doesn't work with the iPhone. The Apple Watch Series 7 recently introduced USB-C to Watch charging cables so that the device can charge 33 percent faster than its predecessor.
Technically, supported AirPods cases can charge with standard Qi charging pads from any manufacturer. However, 3rd-parties (such as Mophie and Belkin) have built specialized cradles/stands for it combined with connectors for MagSafe and Apple Watch so a single bedside charging solution can be used for all three devices once. And although AirPods can charge with a MagSafe cable as a Qi Pad, they cannot magnetically attach to it, so you need to use a Lightning cable for an in-bag solution.
This is a proprietary interface specific to charging the Apple Pencil, the Magic Keyboard, and other 3rd-party accessories connected to the iPad. The data transfer method and speed are unknown but it is likely slower than USB 1.0.
So, depending on how many Apple products you own, you may have up to 5 types of charging connectors to deal with and multiple variants of cables and docks that you need to need to own as well, depending on your use case.
It's a mess.
Cleaning it up requires a desire to fix the situation
Indeed, the low-hanging fruit here for change is iPhone. There's no technical reason why USB-C cannot be used for iPhone, iPad, and the MacBook, at least from a charging connector perspective. So why doesn't Apple consolidate this, finally?
Why not do it now? I suspect it has to do with a desire to implement Thunderbolt or a similar high-speed data transfer technology across the line at some point in the future. Clearly, if the intention is for iPhone (and iPhone Pro) to be used to create professional video content, they will need much higher data transfer speeds for moving large video and collections of photos to the Mac and to the iPad Pro than what Lightning can accomplish now over a USB-C connection.
Thunderbolt is an important technology for Apple, as it is also used within the M1 and legacy x86 Macs to connect to all sorts of devices, including external displays, using DisplayPort.
While they could implement USB-C now in the iPhone the same way they have done for the iPad Air and the iPad Pro, my guess is that the technology to put Thunderbolt into a small device is not ready. It just cannot be manufactured at scale yet, or it requires relying on Qualcomm, Intel, or another vendor to add it to the component bill of materials. It's also possible the Thunderbolt circuitry as it stands now is too power-consuming to be practical for something smaller than the upper-level iPad.
But maybe there are other factors at play
The iPad Pro 2021 M1 is currently the smallest or lowest-end product at Apple to have Thunderbolt transfer speed. Therefore it appears only M1 silicon contains the support electronics to implement Thunderbolt at this time.
I also suspect it has to do with the current state of the supply chain and the company's overall desire to be self-reliant from Intel and Qualcomm and other suppliers from an IP and component standpoint. The company is already looking to move more and more functions, such as 5G, into the Apple Silicon itself, without relying on support chips made by other companies.
I guess that if a USB-C changeover for iPhone occurs, it will happen when the company can put more power-efficient Thunderbolt circuitry in the A-Series chips. However, It's also possible that Apple may choose to develop its own data transfer standard for its products rather than rely on Intel from a certification standpoint.
Although Apple initially developed Thunderbolt with Intel, it's clear the relationship between the two companies has been strained since it transitioned to Apple Silicon from x86 in the Mac -- this is evident from its reluctance to implement the latest version of Thunderbolt on the Mac and the iPad Pro, Thunderbolt 4. While Thunderbolt is now a royalty-free technology as of 2018, Intel still maintains control of the certification process by 3rd-party vendors, a condition that Apple is probably not happy about.
Apple undoubtedly wants a wired data transfer technology that scales from the smallest things it builds up to the largest, with data rates as low as hundreds of megabits per second (Mbps) up to tens of gigabits per second (Gbps) depending on desired power consumption footprint. And the company will want to build it into its own chips and not license it or require it to be certified by anyone else.
And wireless charging? MagSafe certainly sounds like it is the way the company is going to go -- and it would not surprise me if the yet-to-be-announced AirPods 3 and its successors can connect with that cable.
While I would like to see the Apple Watch situation also taken care of with MagSafe, it's probably not something we are likely to see until Apple Watch 8 or later, as some engineering changes are likely to be needed to the product and the MagSafe cable itself so it can accommodate iPhone, Watch, and AirPods simultaneously.
Clearly, I would like to see Apple resolve this sooner rather than later. Because what we have now is unworkable for the long term.