@iska@mk.starnix.network
They should be if you have proper microkernel architecture.
QNX used to be like that, it was true microkernel and RTOS on top of that, so kernel was designed to be really minimalistic, AFAIR it only had IPC and memory management, everything else: networking, filesystems and whatnots were modular, so you could remove them lest you didn't need them.
Then Quantum Software were acquired by RIM and it all went south 😢