You can easily turn off automatic updates. I check the forum before I update. Haven’t had any issues for 10+ years.
It's been awhile since I used Unifi, but regardless of the label they put on their binaries, things felt like beta. That doesn't mean I had issues per se, or things I couldn't work around. But it may be missing things, almost certainly missing promised features, rough around the edges, etc.
A neighbor has a bunch of Unifi devices and he just has his on autoupdate and never has issues. I definitely am scared to give them that much control.