Flash did skip frames when it couldn't keep up, and this is what any animation framework would do as well for HTML5, or video in video players and so on. We do

Flash did skip frames when it couldn't keep up, and this is what any animation framework would do as well for HTML5, or video in video players and so on. We don't have a well established (in people's minds that is) framework and IDE for it that did all Flash did. But actually I do believe we have everything in place in terms of APIs and capabilities, and in fact even more, because... have you seen some of the WebGL animations? PixiJS? The others? I doubt. WebGL + the rest of the web stack is way more powerful than Flash EVER was. Mindshare matters. Without an established IDE and people knowing about it... it's not happening. Another issue is that Flash-like content was notoriously mobile-unfriendly. So we do less of those types of UIs now. Not that we can't... but it's harder.