I think “the internet doesn’t forget” was not originally intended that way. It is a reminder that it is hard to reliably delete something from the internet. Unrelated to this auto desk issue.
The internet does forget in the sense that stuff goes missing. Just, only stuff that you don’t want to go missing!
It's essentially a law of the internet. Well-researched website on a niche topic written in the 00s? Lost forever. Your edgelord blog from when you were a teenager? Backed up in triplicate.
WebArchive still has a copy of a website that I made that is just text "John Smith is stupid", with John Smith being a friend of mine from teenage years.
The internet does forget in the sense that stuff goes missing. Just, only stuff that you don’t want to go missing!