I don’t remember security being the reason flash was killed, but rather mobile being the culprit. Flash on first gen smartphone was just impossible to run, it w

I don’t remember security being the reason flash was killed, but rather mobile being the culprit. Flash on first gen smartphone was just impossible to run, it was slow, not meant for touch, basically a horrible user experience that also drained batteries. So, most ads skipped to JS or gif animation, and most game developers rushed to develop for the app stores (where money could supposedly be made much more easily than on the web).