It works pretty well out of the box unless you're trying to combine Linux with Nvidia hardware. Even with Nvidia hardware it doesn't take that much effort to make it work, but as usual, Nvidia requires taking extra steps.

What Linux is really lacking is a user-friendly method for enrolling your own keys, which would instantly solve all the Nvidia/firmware updater/custom bootloader problems. The command line tools are slowly getting easier to use, but there's no guided instruction flow.