A lot of people - including studios who use it for projects that can take years to complete - were very unhappy at the prospect of having the only tool that can read their mountains of FLA files (the file format the Flash/Animate editor uses, and used to compile into a SWF) stop working because Adobe turned off the auth servers. Adobe has pulled back to "okay we're, uh, putting it in maintenance mode, expect no new features, ever, just security patches".