This has history: https://egopoly.com/2008/02/ssh-slow-on-leopard.html

I also know of https://github.com/Crosse/sshsrv and other tricks

I agree more SRV records would have helped with a tremendous number of unnecessary proxies and wasted heat energy from unnecessary computing, but in this day and age, I think ECH/ESNI-type functions should be considered for _every_ new protocol.