I haven't encountered any bugs, but I do experience the random hangs + general slowness, and it's awful. It seems like Apple was lazy and didn't test properly

I haven't encountered any bugs, but I do experience the random hangs + general slowness, and it's awful. It seems like Apple was lazy and didn't test properly on older hardware (or perhaps didn't focus as much as they should have on, "is this user experience good?" on older hardware).