The biggest downside being that you couldn't transfer accounts between devices. It was a case of blitz everything and start again. I've come across a lot of people who entered the tarpits when this happened.
But finally, as 2020 draws to a close, this feature comes to iOS and iPadOS.
The newly-released version 3.1.0 is the first refresh the iOS app has had in over two years, and adds the following:
- Added the ability to transfer accounts to a different device, e.g. when switching phones
- Refreshed the look and feel of the app
- Dark Mode support
Personally, I moved over to Authy and have had no problems. This app is more feature-rich, and also works on Windows, Mac, and even Linux (along with, of course, iOS and Android). However, for those still using Google Authenticator on iPhones and iPads, this will be a welcomed update.