Frankly I don't see the point of complaining that libc is not useful for non-C consumers. Sure, there are some ancillary functions in libc you'll likely never c

Frankly I don't see the point of complaining that libc is not useful for non-C consumers. Sure, there are some ancillary functions in libc you'll likely never call. But what's the issue with making syscalls through libc? Again, the only difference is what the very last call instruction is. If your runtime can marshal arguments for the kernel, then it surely can marshal arguments for libc. They are almost always practically the same ABI. And you can avoid the need for VDSO-like hacks which is basically the kernel exposing a mini-libc to userspace.