Well, I don’t count this one. It large companies there are enough “information fluctuations” that some fringe OS projects emerge. Microsoft had super-secret pr

Well, I don’t count this one. It large companies there are enough “information fluctuations” that some fringe OS projects emerge. Microsoft had super-secret project Genesis, then some managed kernel project I don’t even remember codename of. They even make sense from top-level management perspective (“What if we are missing next big thing?”) and allow creative talent to chill out doing something cool without going to competition. But at the end of the day these projects don’t amount to anything. If they ever become threat to mainline org, they are consumed in the political battle and grunts are re-orged “to integrate developed technology into the main product”.