That might explain why some manufacturers don't invest at all in Linux drivers. However in an alternate reality where they sell Linux laptops and Windows turned into a fringe desktop OS for some 2% people (I'm one of those 2% Linux desktop users), hibernation would work very well on Linux and with some luck on Windows. That despite any possible architecture of the Linux kernel: manufacturers would make it work even with a kernel written in COBOL and drivers written in BASIC in a sandboxed DOS virtual machine. /s