Notice that it's still very much possible to produce SWF files with languages like Haxe http://haxe.org/, and there are frameworks that mimic the Flash drawing API like OpenFL https://www.openfl.org/, there is (or was) a lot of interesting stuff like that happening around.

Weird coincident.. last I week I installed "Flash MX 2004" in linux using wine. Works flawlessly! Gonna make some cool shit for "newgrounds flash forward 2026"

I had a start programming and doing little weird animations back in the early 2000s. Then I could earn a living doing stuff with Actionscript, little games on the web, or profile picture generators; even stuff on the BlackBerry PlayBook, which had support for AIR runtime. I made games with Flash and Actionscript until ~2015. Newgrounds even holds a jam called Flash Forward, in which you submit Flash games https://www.newgrounds.com/collection/flash-forward

I stopped using Flash long before it became Animate. I'm really sad to see it go, and that Adobe has so little love to this important piece of the web and the Internet.

They could have at least offered some legacy version for file access