I disagree, Flash was a real battery sucker on Android. Native CSS animations were usually smooth in Chrome; Firefox still hasn't caught up entirely on that front I feel.

Feeding animation frames through JS rather than letting the browser do its job does take a toll, but Flash freezing the entire tab while the browser plugin initialized is something I've resented the moment HTML5 came along.

In the age of the Pentium III, Flash was state of the art, but it's been a couple of decades since then.

I don’t know about a III but Flash was good in the early/mid 2000’s while I was attending university.

Certainly was 10x better than what HTML was providing at the time, HTML really only jumped forward in this department when Steve banned it on iOS.

I don’t miss it, however my friend at uni made some wicked animations in the adobe Flash editor, whatever it was called. He should’ve went onto animation etc but stuck to programming.