Until Steve Jobs went on the toot horn and told everyone Flash is terrible and it needs to die. No surprise there, old Steve just launched the app store and wanted 30% of every game thank you very much.
Then to everyone's surprise, the Adobe CEO went on TV and agreed publicly that Flash had to go and we're working on better "open" tools.
All flash developers around the world, even "certified" ones like me (lol!), watch in disdain and disbelief. We're HTML5 developers now. Back to backbone and jquery we go!
Long Live Macromedia Flash, and F Adobe. AS3 was OP back in the javascript days where it couldn't parse int properly. Flash got ridiculously fast after years of improvements, and it was unique with this blend of timeline and scripts. Adobe Flex was also a decent web application framework. We don't talk about Director anymore, as well, who was a very powerful tool.
All of that is gone now, replaced by teams of 5 people to do the job of 1, and basically trying to get as productive as we were then.
But what about game frameworks for web games today? A wasteland. A hundred possibilities and none of them doing a particular stellar job.