(I have a Dropbox annual plan)
P.S.: Google Drive desktop was renamed to Backup & Sync which is usually the first sign a Google service is doomed.
Jokes aside, it makes sense to shut down, I can't imagine many Prime subscribers knew they had it, and it's probably a huge headache for them to worry about it being used for copyright infringement, etc... but it is odd timing to announce this now with the recent increase in Amazon Prime's membership fee.
Pivoting it to Photo/Video library archival is probably more useful to consumers (and cynically probably more useful data for Amazon...)
Prime members do get Photos, which is staying.
Amazon Photos, however, with unlimited storage has been great for archiving family photos.
Nice reminder of what I was doing back then looking at those project documents!