What would be useful too is if a portion of your 'subscription' could count against a full purchase if you decide to buy. Let me pay $49/month for a couple months for indesign while I need it. If I decide that I want the full version, give me a prorated discount.
Yea, I would also love to say to my landlord "Hey bro! You know I've been renting this apartment from you for a few years now, and I would like to buy the joint at a prorated discount"
Your Landlord can't just create an infinite number of apartments on the fly and rent them to an infinite number of people at almost no extra cost to him.
With software, this is a very real possibility and rent to own makes perfect sense.
The minute Adobe says they will do this I'm in. I would love to be able to pay for 12 months and finally have my own copy.
At about that time, they may release a new version, and at that time, heck, I might just stay on the subscription plan so I get the newer one. BUT, if I stop, I still have version 5.5 that I paid for in full.