Comment by gritzko
lubuv, libevent introduce a layer of abstraction, their own approach to buffer mgmt, etc. If poll() works, better stay with poll(). It is universally portable, things stay pretty clean and simple as a result.
Right now I am working on JavaScript bindings for a project and doing it the node.js way (or Deno) is definitely a no-no. That would be one more layer in the architecture, if not two. Once you have more layers, you also have more layer interactions and that never stops.
I mean, complexity begets complexity
https://github.com/gritzko/librdx/blob/master/js/README.md
Having more than 1000 conns per a thread is a very specific usecase.
Very specific, but very common, such as a web server, forward proxy, reverse proxy, load balancer, etc. Used in high millions of instances. I'd say a toy CLI tool is a very specific usecase for a lot less people than the above.