Creative Cloud subscriptions carry a key advantage: Apps will get periodic feature enhancements (i.e. early access to functionality that would otherwise have had to wait until the next major product release). Here’s a peek at what’s coming soon to Illustrator subscribers:
I suppose someone will make a comment like “You are telling me that you are punishing customers who have purchased a license the way it has always worked.” No, actually: no one is getting punished. You now have a way to get early access to new features, but that’s up to you.
If you want to buy a license the traditional way, that’s perfectly fine, and you can wait until the next major version release (CS7) to get these & other improvements. If you subscribe, however, you get an additional advantage.
We should also differentiate these periodic feature enhancements (which are a subscriber benefit) from bug fixes & compatibility updates (which will go to all customers, same as always). We’ll work on being clearer on the latter (believe me, I share your frustration at the pace of info-sharing). The key point, though: nothing is being lost, and something cool is being gained.