Thanks for the warning.
Luckily I had uninstalled Flash a few days ago already, almost had no use for it besides watching the live demos in the occasional old programming tutorials or something. A lot of web games use(d) it, as well.
What made me delete it at last was that update popup. It's so annoying. The message is always "security fixes and performance improvements", for every single update.
Well, why don't you just write a performant and secure software at once and then avoid all those updates? Maybe the team responsible for it needs a reason to stay employed, so they change some variable names and say "okay, let's call this a new version".
If there's so many open holes in your software that you need to have several updates for it, maybe you should rewrite it from the start and take a different approach?