By desktop I include laptops (many don't work out of the box) but larger systems can be weird too. Just the choice of CPU can decide whether hibernate or suspend works at all. There's a large ecosystem of accessories which have no Linux support. Video cards have been a nightmare on Linux for decades, famously the reason Torvalds gave Nvidia the finger. Even when something's technically supported, it may require obscure undocumented boot flags, bit-twiddling, userland apps which may not work on the same distro as the kernel you want to use, and of course there's the Wayland debacle (abandoning X extensions that lots of devices used to use to control features from touchpads to input pens)