It's not like Adobe gave up because of the security holes. Flash always had security holes. The way I remember the history Apple blocked Flash on their phones, which gave others an excuse to also kill Flash. It then only took an entire decade for Flash to finally disappear officially.
Wingless wrote
Wow. I never heard of "Ruffle". An experimental software meant to play files for Flash, which was so hopelessly insecure that the giant company Adobe gave up on maintaining it despite the black eye that gave them. What could possibly go wrong?