[0] https://www.microsoft.com/en-us/download/details.aspx?id=524...
[1] https://wiki.netbsd.org/ports/emips/
[2] https://www.microsoft.com/en-us/research/publication/an-onli...
You can opt to build it yourself and exclude anything that is not 2-clause BSD licensed, as some drivers and such are if I recall correctly.
With new CVEs being discovered in ancient bedrock code on the daily, it seems prudent to switch to a NetBSD/OpenBSD/Qubes system for the next few years until some vulnerabilities might get smoothed over.
Overall i really love FreeBSD for everything computing (Pi/Laptop/Workstation/Servers).
And the community is great...wanna make a port/src-patch?...just send it to the bug-tracker, no rituals needed ;)
Maybe the AI can even check "funny" upstream commits like it happens with npm/crate and block that stuff.
But FreeBSD ports is incredible up to date so there should be no flood of patches anyhow.
It has a working X11 with DRM from linux as base so everything graphical will work mostly fine. The issue is more around the OS and some subsystems. OpenBSD is still using the Giant Lock model, so SMP can be an issue. Linux has more independent subsystems so heavy processing is unlikely to impact usb audio (which is an issue I have with my oldish laptop). Another issue is the input subsystem (wscons framework) which is not as sophisticated as Linux Input subsystem. In general, linux subsystems are more sophisticated/complex than their OpenBSD counterpart, but the latter work well enough.
There are some linuxisms in some applications (the recent moves to wayland/systemd,...) but they're mostly easy to port.