(author here)

I didn't mention tokio's io_uring because, as far as I understand, it is unmaintained. I vaguely recall a conversation in which someone (a contributor?) was claiming that it was not possible to implement most of the features of tokio on io_uring due to conflicting models. [source needed], obviously.

I will admit the very existence of glommio or monoio had entirely slipped my mind. I'll probably need to add a few paragraphs about thread-per-core runtimes. Thanks!