New operating systems today tend to be just ways of reimplementing Unix. If they have a novel architecture -- and some do -- the first thing to build is the Uni

New operating systems today tend to be just ways of reimplementing Unix. If they have a novel architecture -- and some do -- the first thing to build is the Unix emulation layer. How can operating systems research be relevant when the resulting operating systems are all indistinguishable? [...] Linux is the hot new thing... but it's just another Unix. Although they are rooted in FP notions of purity and immutability, I would say that NixOS and Guix try to fundamentally change operating systems.