I know a large number of people who maintain older Macs and PC specifically to run older versions of Adobe Photoshop and Premiere. This is going to hurt the freelance video editors very hard.
If so, I can't imagine what Adobe could actually do to stop them? I figure the idle legal threats seen so far (I know of two people who claim to have received emails from Adobe - I'm awaiting one myself, as I still run 2014 Photoshop on this machine) is simply so they have a platform from which to deny access to older versions as provided through CC.
Anything installed from disc is beyond their practical reach.
I'm really curious to know what's underlying this - if it is a third party reason, I'm kind of flumoxed at Adobe's stance towards its presumably quite loyal userbase!
Frankly, I hated paying as much as I did for Illy and PS here in the UK, which compared to about the same cost as the full suite in the States, but I complained sometime in the last year and now have the full suite for a mere 30p more than I was previously paying.
I still dislike their subscription model, but it now leaves a bit less of a sour taste.