SharePlay to Mac (I tested audio) is utterly broken. Shockingly so. I just tried it again, and my music isn't paused, yet is stuck at 0:02. Pausing and unpausing it, and the song starts ticking, 0:03, 0:04, and so on, but you can't hear any audio. Pause it again. It goes back to 0:02. Now try this with AirPods connected to your Mac. Connect your iPhone's Apple Music to AirPlay to Mac. The YouTube video you had playing on your Mac gets paused, for no reason. But at least you hear your iPhone's audio on your Mac. Now pickup your iPhone. Your AirPods have now switched to your iPhone, that's still AirPlaying to Mac. You can't hear your music anymore. You reconnect the AirPods to your Mac. You can hear your iPhone music for a few minutes. Suddenly you can't hear anything. Pick up your phone, the volume slider in the Music app went all the way to the left. You can't move the volume slider to the right, like it's frozen; but the song is still playing. You go to Control Center, and finally manage to increase the volume. A minute later, the volume goes to zero again. If you were hoping to compensate for Spotify Connect not being on Apple Music, you'll be disappointed.<p>Also, Safari has a bug that ignores your setting to not reopen non-private windows, and reopens them anyway, so if that's important to you, you may want to temporarily switch to another browser.<p>And yes, it still has the "occasionally laggy trackpad cursor" bug on M1 for me.<p>But other than that, it seems quite a bit faster than Big Sur, and so far (past 2 weeks), very stable on the core stuff.