To be fair, flash was garbage proprietary tech fully under control of fucking Adobe. All the shit people hate about JavaScript now, the spying, the adtech, was done in flash first.
Iirc, wasn’t flash deprecated because of unpatchable bugs that created a gaping hole in your browser security?
Ironically I believe flash mostly died for that as a founding moment on why apple would not support it on iPhones. Adobe only finally killed it after safari decided it wouldn’t support it