Comment by LegionMammal978

> It is different, uniquely so, on linux: on most unices the kernel and libc are developed as two sides of an entire system, both being updated in lockstep when the system is updated.

Do FreeBSD [0] and NetBSD [1] not fall under "most unices"? They similarly retain backward compatibility in their syscall interface, so that old binaries with old libcs can run on newer kernels. Linux does not stand alone here.

[0] https://wiki.freebsd.org/AddingSyscalls#Backward_compatibily

[1] https://www.netbsd.org/docs/internals/en/chap-processes.html...