Well, what I know from Linux, the system administration load is substantial, the end user documentation is embarrassing and the device driver support is appalling.
How easy is it to get the latest and greatest graphics card running on a Linux box?
And more pointedly, how wonderful is battery management on Linux laptops?
I am willing to bet a buffalo nickel than Linux running on a notebook won't have better battery life than the same system running Windows (or whatever its native OS is). It didn't twenty years ago and it doesn't today.
Don't get me wrong, Linux is a fine candidate for servers, connected devices, routers, smart doorbells, game console emulators, etc., but it is a piss poor operating system for general desktop/personal use.