Disagree, Adobe's problem was they made it too easy to create crappy content which could give the browser bad performance. And by make it too easy to deploy that bad content to the web.
Now that the majority of bad flash developers are gone, and it's being used less for ads and more for mobile, maybe it can make a come back.
Require developer accounts with authorization tokens to consume more than a set amount of CPU before the framework terminated your animation? Call it "Flash Pro" or something.
Then at least you've got an account on Joe frameloop ad.
So I would need a developer token to put up a flash animation on my website? I'm sure that would have killed adoption, and my hunch says that the ad agencies that were churning out the 100% CPU ads who dropped $799 on Flash could pay for the developer account anyways.