As someone who has used OSX for .. 21 years now and is slowly, but surely moving off: the grass is not greener on the other side.
Bugs aplenty, a user interface which has seriously deteriorated over the last decade bundled with an ever-increasing user hostility and tendency to lock you out of your system.
One example: you can no longer manage which applications may run as daemons/background tasks. Any application can register itself with the OS to do so, and your only recourse is a little tiny switch in the system preferences.
Only, in the case of Google Chrome this does not work; the application constantly re-registers itself, overriding the setting. I can no longer prevent Chrome from doing whatever the hell it wants to do, and — adding insult to injury — every time it does, I get a persistent notification from macOS that it is now doing what ever the hell it wants to do. About a dozen times a day.