> But I'm always a bit sceptical about such approaches. They are not universal. You still need glibc/musl to be the same on the target system. Also, if you compile againt new glibc version, but try to run on old glibc version, it might not work.

Why would you include most of your dynamic libraries but not your libc?

You could still run into problems if you (or your libraries) want to use syscalls that weren't available on older kernels or whatever.