He's just joking of course. At first glance this seems like a great read. And he's funny too! :)
I do wonder how much of this is applicable to Rust though.
https://www.drdobbs.com/open-source/io-multiplexing-scalable... (Also covers select and /dev/poll but lacks epoll,kqueue)
I remember chatting in the fringes when nodeJS was doing their proper win32 porting and they did have some issues getting things stable due to lack of documentation but iirc got some help from MS so the libuv code should be usable as a reference for behaviours (As well as being fairly battle tested by now).