Well, as a player, there's Ruffle [0] now which seems to do a very decent job. But it seems like it came out when Flash was already a faint memory, and also the authoring system is of course still closed source. I guess that much of the great content in the early days was created on pirated versions of the authoring system, greatly helping its popularity. With Adobe CC, piracy isn't really possible anymore (AFAIK).
> With Adobe CC, piracy isn't really possible anymore (AFAIK)
I’m a paying user, but it is possible, it’s just harder and requires more frequent patches. Along with macOS making it harder and harder to run unsigned binaries, it truly demands a lot of effort from the user
[0] https://ruffle.rs/