Surface supports Ubuntu 18 out of the box pretty well for regular use. The caveats are the touch screen doesn't work, I had to make a one line fix to get WiFi to stop failing randomly, and setting up luks at install time can't be done without an external keyboard because the type cover isn't recognized at boot until a one line fix is made, but that's it! I've used it as my daily setup for several months without issue. As a backup I have a Windows to go instance on an external SSD that I can fire up.