Beyond that, tmux is (for me and probably many others) critical software used constantly when SSH'ing into many different boxes. Different boxes running differe

Beyond that, tmux is (for me and probably many others) critical software used constantly when SSH'ing into many different boxes. Different boxes running different versions of tmux. Making it impossible to share one config file everywhere - you either need to have multiple config files for each version or simply drop any custom config that isn't cross-version compatible.