:gen_tcp can use a port under the hood, which you can’t send to another node.
Take a look at Cowboy for a good example of using an acceptor pool, but note that that runs on a single node. If you wanted to do the heavy work on another node, you could use a loop handler that starts the work and waits for a reply.
Why? Those are both useful tools, and unless you have a specific need they don’t address you’re not going to gain much by trying to re-implement them by hand in the BEAM.
