There's actually quite a few new tools that do "animation for the web". I'm sure there's a longer list but the ones I've used are rive, jitter, fable, and lottielab. Rive is interesting but the one I find myself coming back to is lottielab, it feels the most like the "spend 4 minutes playing around, but now I have something that looks really cool" that I used to get when using flash
I'd love to see this get adoption, I use a few different whiteboarding apps for the different features they offer, but would be great to have more portability between them. e.g. I find tldraw great for creating diagrams, but when I have to share them with people I end up screenshotting and pasting into figma
