> It is much more user friendly and usable imo.
I've never quite understood why TUIs on *nix systems seem so downright unfriendly compared to TUIs on ye olde MS-DOS systems. Some of them are excusable, sure. vi predates consumer TUIs, and vim clones it. Emacs at least has a menu bar, even if there's no on-screen indication that F10 activates it.
But tmux was created in 2007. I can think of no reason for it to have such an obtuse UI other than "they're just like that on *nix". Would at be so much to ask to at least by default have a "press C-b ? for help" on screen?