[anthk]

FUSE is dog slow and it's a bad hack compared to mount anything anywhere in 9front without root permissions.

Also the API is much simpler than POSIX.

Hurd with settrans made things much easier than the classical Unix, but it's still in alpha and it still has to implement POSIX for convenience.

[packetlost]

I agree. tbh I would immediately switch to something with the hardware support of Linux and the user space of Plan9/9front