The cloud OSes have long left classical UNIX behind, Kubernetes or managed languages on top of type 1 hypervisors are the name of the game, even if there is some POSIX based kernel somewhere on the stack.
On the mobile side, although Android and iOS have some POSIX support, it hardly matters for app development.
Even on macOS, which is a certified UNIX, if you want access to some of the modern networking APIs, they are only exposed at Objective-C level.
So while POSIX kind of has won, long term it has been yet another phase in the history of computing, thus looking forward to such alternatives.
The cloud OSes have long left classical UNIX behind, Kubernetes or managed languages on top of type 1 hypervisors are the name of the game, even if there is some POSIX based kernel somewhere on the stack.
On the mobile side, although Android and iOS have some POSIX support, it hardly matters for app development.
Even on macOS, which is a certified UNIX, if you want access to some of the modern networking APIs, they are only exposed at Objective-C level.
So while POSIX kind of has won, long term it has been yet another phase in the history of computing, thus looking forward to such alternatives.