For those that don't know.. Tannenbaum wrote the book on Operating Systems... Well a book. I think his OS Minix[2] is in there. Its on every intel CPU, but I think that was news to Tannenbaum.

This argument was at its root a "theory" vs. "getting it done" now argument. I think thats why it resonates.

[1]https://www.amazon.com/Modern-Operating-Systems-Andrew-Tanen... [2]https://en.wikipedia.org/wiki/MINIX

This is a debate about how OS's should be structured. There is some merit to Tanenbaums MicroKernel approach, but ultimately its slower and for an OS that matters, thus Linux being ascendant . Also everywhere gcc was ported could compile and run linux.

Microkernels "lost" but there was a microkernel called "Mach" worked on by Avie Tevanian who went to Next then to Apple. I think OS-X is kinda microkernel based (if they're still using XNU which is loosely based on the mach microkernel.).

https://en.wikipedia.org/wiki/XNU

I still miss HPUX RTE for PARISC(Real Time Extensions) for sending jobs to specific processors or processor sets, disabling interupts....

If you like OSs. I like the case studies in the dinosaur book: (stupid text-book prices though....)

[4] https://www.amazon.com/Operating-System-Concepts-Abraham-Sil...