>>> I’ll proceed to give them a two minute tour about what you can do with tmux. After that they’re either hooked and want to try it themselves or they tell me to go away with my ancient neckbeard tools and just use iTerm2.

FYI, iTerm2 actually has a tmux integration. Allows you to get the best of native paneling and persistent sessions.

https://www.iterm2.com/documentation-tmux-integration.html