I don't know because I haven't bought one, but I do know they run their own distro called Pop_OS[0] which is improved ubuntu (with likely impeccable support for their hardware).
That in-and-of-itself is a pretty impressive investment to me, but I would probably take it off and put arch on it. Honestly I am not too worried, it seems like I can actually call them for support/file bugs/ask for technical help if I actually came across an issue -- surely someone over there knows something if they want to maintain their own distro.