Capabilities are better, thanks to WebGL and modern JavaScript - and no proprietary tooling is needed, but the overall barrier for entry now is much higher: during the heyday of Flash any teenager could put together something silly, adapt, learn, improve, and beyond. You can’t do that anymore because there is no good, well-supported, code-free way of making art and animations without writing any code for HTML5+Canvas.
None of the kids that got started by making silly animations in Flash back in 1999-2007 could do that today: there is no paintbrush tool for the web.
I understand that Flash's HTML5 support requires a Flash document to created from scratch to support HTML5 and it doesn't support the same features as SWF - but I might be wrong.
None of the kids that got started by making silly animations in Flash back in 1999-2007 could do that today: there is no paintbrush tool for the web.