If you miss the authoring tool, it's now called Adobe Animate: https://www.adobe.com/products/animate.html
If you miss Flash games and animations, there seem to be a bunch of archives. The FlashPoint Collection has preserved over 170,000 games and animations: https://flashpointarchive.org/
It's called something different now, but the authoring tool is still available and targets modern, standards-based runtimes: https://www.adobe.com/products/animate.html
I miss it and Visual Basic 6.
(And operating systems that were just operating systems.)
Not just for the awesome creative pockets of animation it enabled (though that's a major factor), nor for the insane quantity of small and medium games it inspired (also a huge factor)
I also miss the entirely unnecessary creative multimedia websites with their novel explorations of interaction.
Despite (or perhaps because of?) their occasionally inscrutable design and usability, lack of accessibility and other opposing arguments; there was something exciting about the unhinged and pointless exploration of novelty, community of knowledge share..
I revived this simple loop the other weekend and it was a breeze to extract the media;
https://fwoofy.moe/ (sound warning)
Original https://dagobah.net/flash/fwoofy.swf
But Flash, the platform on which to deploy my games and experiments made with FlashDevelop and AS3, is still unmatched by anything today.
Flutter's pretty close, for mobile targets. The web performance and library support is still not quite there for games, but its getting there.
But tech likes to get more complicated and deprecate swaths of tech/good games/code that can't be maintained.