It would make sense if there were 2 commands, tmux-server for starting the server and tmux-client for starting the client. The client would then support option

It would make sense if there were 2 commands, tmux-server for starting the server and tmux-client for starting the client. The client would then support options to connect to an existing server or spawn a new one. I'm a big fan of abstracting away details of little importance. But if I risk using an old server with stale values in its environment, I prefer that to be made explicit and not abstracted away.