> if you use multiple macOS machines, Apple will now sync your desktops between them, too Oh No. Please no. If I had to come up with a list of 5 things Apple is really bad at, sync would be one of them. I've basically stopped syncing my phone and desktop because of all the duplicated calendar entries syncing creates. It's something I have absolutely zero trust in them to do properly.
It's hard to get a real impression of what problems may or may not exist, unfortunately.