And I've been using it on production servers since 2000. The biggest pain I remember is CUPS. It's still an opaque Windows-inspired piece of monolithic crap, and there have been month-long periods when new releases didn't work for mysterious undiagnosable reasons.
But other than that, I upgrade a few times a week and have only had a few glitches.
Bleeding-edge is "experimental". I've used packages from there occasionally.