Once you really know your keyboard, it's like an extension of your hands. You can fly through those six terminals, and moving your hand to grab a mouse means stopping whatever you were doing. That wall of text is all familiar to me - I see an UI full of empty space and wonder what I could have used it for.
Of course there are great reasons for using pointers also. I'd say this is mostly a preference, I'm sure you are extremely effective using your own methods. I have maybe two dozen terminals open atm, and I can tell you what each of them is for - but put a phone bill or a bank statement in front of me and it might as well be Greek.
Reading long walls of unrendered markdown is where the TUI is not fun and the GUI can shine. Especially when illustrations come to play.
Also editing your own prompts with a normal text input is far better IMO (instead of whatever magical box Anthropic or OpenCode has shoehorned into the terminal).
You're not wrong, and I predominately use a TUI at work where I'm actually at the computer for ~8 hours a day.
But I use OpenCode / OpenChamber for personal stuff where I might only get 20 minutes at my computer before I have to go do something else. So the web interface and especially the mobile app get more use from me there. It's kind of wild to be working on a project while walking my dog or washing dishes or something along those lines.
I also used the desktop OpenChamber app once recently because it has a built-in web browser that the agent can fully control (unlike, for example, Gemini in Chrome).