Been on Tahoe now for a few weeks. The new rounded corners bug me a bit, but aside from that it's been rock stable. The trick with macOS is of course not to immediately upgrade. Give it a few weeks before you go to a new release.

I've been through all the releases since Jaguar in 2003. There's been some ups and downs, and a lot of complaints, but I'd say it still remains the most rock solid UNIX desktop OS out there.