No, and a lot of Flash projects have already been converted; notably, Google was one of the first to release a flash-to-html5 converter, because a lot of ads were Flash at the time.

But Adobe's missed opportunity was keeping Flash alive, "just" adding a html5 / canvas / JS version instead of the browser plug-ins that were killed when smartphones/tablets refused to support them.

It's the flash animation/design tools that are missing from modern young people, not the ability to render it into the browser.