That's not quite true is it?.- If it were, I would have waited till CS7 or CS8 before upgrading from CS5. As it is, I bought an upgrade to CS6 last week because as far as I know, it is to be the last version of Photoshop that I will ever be able to buy.
Adobe does not want us to buy their software anymore. They want to control our access to it by renting out the use of the software. That way, instead of the customer deciding which upgrades are worthwhile spending our money on. They get to continually take our money while providing whatever they see fit to provide. Withdrawing access to important tools, if for any reason we are unable to meet the rental payments.
You see, I'm not the 'professional creative industry', I'm a professional creative individual, who sometimes gets paid very late by the 'professional creative industry'. Which means I have a variable income. Which is why, when I have the money I replenish and update my tools. I expect them always at hand when I need them, not to have them snatched away due to unplanned dips in my income when I need them most.
This outrageous move by Adobe to restrict access to industry standard software, will hurt a great many artists and freelancers on variable income. It's nothing short of a contemptuous breach of trust with long time PS users.