I say this every time someone brings up Flash's failure, but ... It's a tragic failure on Adobe's part. The tools for 2D animations and games in Flash are far beyond anything else out there from a creative standpoint. There isn't a product on the market that comes even close. Everything now is too technical, too specialized. There are lots and lots of artists and developers out there who learned Flash's toolset and g…
The SWF format, and the plugin that plays it, is going away.
The program that started life as FutureSplash Animator, and became Macromedia Flash, then Adobe Flash, is not going away. It got rebranded as Adobe Animate last year.
Animators working on stuff for Youtube or TV probably haven't touched a .SWF in years. You export a .MOV and post that to Youtube. Or you drop it in a video editor along with the .MOVs of all your other scenes for this project. The Los Angeles TV animation industry still uses Flash for some projects; check out https://en.wikipedia.org/wiki/List_of_Flash_animated_televis... sometime, you'll probably recognize a few shows you or your friends love.
If you're using it to make interactive content? You can export to HTML5 now. And to WebGL and WebAssembly. I haven't ever done that myself, I dunno how much hassle it is to convert an old Actionscript/.SWF project to those platforms. I would assume that the 'Animate' rebranding coincided with Adobe feeling that the HTML5 capabilities for interaction were on par with .SWF's; they've been working on that ever since Jobs refused to let the Flash plugin onto iThings.
.SWF is dead, and good riddance. Its plugin was a CPU-hogging binary blob that needed regular updates. It was amazing back in 2000 when it was all we had; it's a lot less amazing now.
The program that compiled a bunch of art and code into .SWF files will live on. The penultimate sentence of Adobe's press release? "...we’ll continue to provide best in class animation and video tools such as Animate CC...". The tool ain't going nowhere. The tool's just distancing itself from its now-much-loathed first export format.
But I would bet money that Animate's file format - the .PSD to its Photoshop - is gonna continue to be called .FLA for the next ten years.