DL DVDs hold 8.4GB and not 5.4
In regards to the article I think Optical Media is a media that is slowly phasing out but the cost of the media for most purposes is still very cheap. A 8.4GB blank disc is under $1 where an 8GB Flash Drive is closer to $15 based off retail pricing. Even in bulk for large companies to use that as a method of software distribution is not cost effective. Most software and video games can be distributed on DVD media which is cheap and easy to produce and very reliable outside of getting scratched or broken. Hopefully someday SSD and Flash Drive technology will be very very cheap and abundant but until that time I think you will see optical media live on for a while.
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