If age of conventions is a valuable metric, TUIs have way more. The keyboard hasn't change noticeably, and I can work way faster between separate windows/panes in a terminal and tmux, than in various GUI windows, where mouse focus dictates when I can start inputting.

While a mouse can theoretically use all pixels of a screen, in practical terms a keyboard has a way larger input space than a mouse, and if I can keep both my hands on the keyboard, I can work much faster.

At least that's my experience as a (starting) greybeard.