I am with you 100% on this (see my separate comment which mirrors yours almost exactly). I like tmux for one reason: I can disconnect from a remote session and reattach later. If my internet connection is interrupted or or I just need to move to a new location, tmux is awesome for this. Beyond that, I really don't get the appeal of implementing terminal multiplexing at that layer. It's a job that can be done much better by a terminal emulator. ssh even has socket multiplexing built in, if you're inclined to use it, but it's only good for a little bit of a performance boost (quicker connection time by reusing an existing socket).