Yeah, I remember writing epoll libraries for Perl (https://metacpan.org/pod/Sys::Syscall, first out 2005-08-01) doing raw system calls because libc on the distros of the time (at least Debian) didn't have epoll support yet.

So in 2005 I didn't expect Postgres to do super well here, but it's 21 years later and we're still pgbouncin'. It's just kinda sad.