When you're paying ~$25/month to upgrade every 2 versions, paying 100% more is not a "bargain". You're being given access to tons of programs you have no interest in. It's like buying 2 cars, when you live by yourself; wasteful.
Because of these new tighter 1-version back restrictions, and the insane price of $1900, or the forced upgrade prices from CS5 > CS6 > CS7, I have to highly evaluate whether I'm going to upgrade at all.
Yes, Adobe does offer "ala carte", but if you look at their price scale, the moment you buy more than 1 app, you screwed yourself over. This is not a true ala carte system that allows the user to pick and choose what they want and pay a respective price. These prices are exorbant. Espeically if Adobe prices ALL programs at $50/month, you would expect to use 5 of them, that $20-$30/month would be expected, but instead you'd be paying $100/month.
Adobe knows its customers rarely just use 1 of its tools. The current buying options with the CS tools is very wasteful with has poor selection options. I want PS, AI, DW, Acrobat and Edge Services. With the 2-version back and $800 per upgrade cost, I was in essence paying about $12/month.
To be on the latest versions at all times, I'm willing to pay 2x that to about $25 ($30 max) a month. But Adobe offers nothing close to that.