Yeah, the example is more for hyperbolic illustration than anything else. My actual use case is that I've got a lot of IP addresses, different usernames and non

Yeah, the example is more for hyperbolic illustration than anything else. My actual use case is that I've got a lot of IP addresses, different usernames and non-standard ports across various servers, so it's incredibly convenient to have my .ssh/config all set up. With aliases (and zsh completion support for aliases), I can do "ann<tab>" which saves me even more time. It won't be long before all I have to type is tab :)