I feel like there is a way more vibrant driver developer community for Windows anyway. It could be the architecture for kernel drivers Windows has or that many people use it for malware and game cheat development. I have a fond attachment to all the tools you have in your disposal once loaded into the kernel space on Windows. win32kbase.sys being at a certain memory location for all processes, KeUserModeCallback etc. all around really fun and interesting to hack with. Doing DKOM on PEB, TEB of kernel processes or user processes to do things you shouldn't be able to do like call win32 apis from kernel pretending to be a process to draw things using GDI etc.
Even though I primarily am a Linux user and I prefer using Linux on a daily basis, dabbling in Linux kernel development failed to create this feeling of awe and infinite possibilities (and exploitability) in my mind.
I guess my point is, Windows Kernel development in Rust excites me. Same with Linux would be very cool but it doesn't create the same feeling of wonder in me. Perhaps that's why this is happening first.