IME most devices end up with only “nearly complete” Linux support. I have spent nearly 2 decades using Linux, and it’s always been this way…
For the remaining polish, that is not surprising. That is also usually not the case with windows itself but rather additional work by the manufacturer. E.g. a few years ago I bought some lenovo laptop without windows. Installed a fresh copy of windows and sound, color profiles, mic quality etc. are decidedly unpolished out of the box, unknown devices in the device manager, ... . Spending some time to get all this from lenovo then fixed these issues, but again that was not done by windows. So I would also not have high expectations of polish for windows on chromebooks or "asahi windows".
In fact, I only recommend/buy Lenovo laptops for family members now and reinstall stock Windows for them to remove all possible bloatware without losing any hardware support.
All my x86 laptops have worked fine. It's only ARM because the hardware is extremely proprietary.
I mean, if it isn't a supported platform that's hardly the operating systems fault. However there are plenty of systems that do have drivers and are supported.
The original quote was that the best supported is WSL, and that is not true.
However, I recently bought myself a Windows laptop (for games and miscellaneous other things). When I've tried doing a bit of development on it I've been pleasantly surprised. The WSL2 integration works well enough that it actually is probably easier than my development environment on MacOS where I have to worry about lots of subtle differences (and since getting it replaced with an M1 MBP due to the battery expanding - some not so subtle differences).