If you stop subscribing you can't work with your files.
They got everyone by the balls, if I just need Photoshop, Illustrator, Indesign, before, I could just get design standard suite, now I'm forced to get all the apps for $74.99/month; they offer a discount but only if you sell your soul for 1 year. So in general they are making people pay more, for irregular releases, less flexibility/choice, and it's not convincing how much value they've added to the CC releases over the past 3 years. They can slow down or speed up their development all they want, if they slow down, you will still be paying the same. And you can't stop subscription because you will no longer be able to use your files.
Microsoft is hinting at subscription for Windows too. Imagine if Windows Vista had been in a subscription model, you'd have been forced not just to use it 1-2 years, but also pay for it every month. Contrast that with what actually happened, which is, Windows Vista was released and people didn't buy it, Microsoft didn't get money, and they were forced to work day and night to redeem themselves with Windows 7.
To me it's clear there is fundamentally far less value/innovation in software subscription for the consumer.