Even a full-featured TUI like Claude Code is highly limited compared to a visual UI. Conversation branching, selectively applying edits, flipping between files, all are things visual UI does fine that are extremely tedious in TUI.
Overall it comes down to the fact that people have to use TUI and that’s more important than it being easy to train, and there’s a reason we use websites and not terminals for rich applications these days.
I suspect that final(*) UI is much more similar to TUI: being kind of conversational (human <> AI). Current GUIs provided by your bank/etc are much less effective/useful for us, comparing to conversation way: 'show/do me sth which I just need'. Not to mention (lack of) walled garden effect, and attention grabbing not in the user interest (popups, self-promo, nagging). Also if taking into account age factor. Also that we do not have to learn, yet another GUI (teach a new bank to your mom ;). So at least 4 distinct and important advantages for TUI.
My bet: TUI/conversation win (*).
*) there will be some UI where graphical information density is important (air controller?) especially in time critical environments. yet even there I suspect it's more like conversation with dynamic image/report/graph generated on the go. Not the UI per se.