- I get OS level notifications when the agent is ready.

- I don't need to use TMUX's wonky keyboard shortcuts

- I moved off of TMUX anyway, when ssh-ing into remote servers became 'not a thing'

- automatic coding session management, like auto resume, layout manamgement, etc. out of the box, without setting up TMUX, which could be a wormhole for some, by the time you fix mouse scrolling, cut/paste, etc...

I'm currently using CMUX, and been pretty happy with it it at this time, but loving the evolution of all these tools