Since the ones that do exist have been covered, I’ll also ask why we need a new one. Linux is pretty good, and pretty big both by code and by popularity. Unless there’s something Linux can’t do, it makes little sense to start all over again with such a mission-critical system.
They are. But you’ve never heard of most of them, and OSes aren’t popular because of their merits.
Drew Devault is building one to test HareLang now. It’s called Ares
Adding to some of the other comments - I think this is a hard area for a new OS to take hold currently. It’s taken almost 35 years for Linux to get to where it is today - which is STILL a niche on the desktop, despite server dominance. (I say this as someone who has been Linux-only since 2007 (edit: not 2023 lol WTH was I thinking) at home)
With that in mind, if I were contemplating a choice between making a new OS or devoting my efforts to improving one of the others (to be clear I don’t have the skills for this to be an actual choice), I don’t know what might drive me to create a new one.