That, and the other OSes (Multics, VMS, VM/CMS) were considered competitive advantages and not really available for hacking on under the hood or porting to new architectures.

Unix only "won" in the sense that it's used. It doesn't mean that the situation has improved since the 80s... Y'all can stop boasting about a completely mediocre operating system with zero innovations for the last 30 years that functions about as well as what it was copying from the 80s. Y'all even failed to implement plan9's bind despite being an obvious improvement from what we have today. We're stuck with crappy, but stable, software that keeps you employed out of pure shittiness. Congratulations on sinking to the level of private enterprise.