Contrarian opinion: Flash was one of the best things about Web 1.0.
The forced move to CSS and the constellation of other "standards" still hasn't caught up to what Flash once offered us.
Flash was all at once a video format, animation format, programming environment, video player, interactive UI system, game programming engine, multiplayer MMO game dev engine, infographics system -- actually, it was literally everything you wanted it to be. And it was so simple that even kids could use it.
If Adobe had opened everything - the format, the player, etc. - it could have become something tremendous that is still with us.
I think there's space for this to be rethought and redone. We shouldn't be so dogmatic that CSS and SVG and HTML and Javascript are the only way. They've had nearly 40 years to shine and we're still struggling with the same issues.
We should be trying to reinvent the wheel.