sosodev , 10 months ago

Flash was a wholistic platform. You could draw, animate, script, play video, compile, etc within a single comprehensive editor. HTML5 + JS was only the low level technology. There was no tooling supplied when the transition happened.

There have been some attempts to recreate the Flash ecosystem since then but they haven’t picked up steam.

Also, there was not any system for porting your existing stuff over to the new tech. Adobe abandoned Flash so you were left to figure it out on your own. These days Flash games can actually be emulated using the modern technology so porting is fairly feasible. But again people have already moved on.