> But I think we will swing back to using GUIs when we find a performant way of making them

I like this new TUI renaissance as well, but if you wanna see what a symbiotic relationship between GUIs x TUIs could look like you need to see what Emacs does with Orgmode and the whole Org ecosystem of org-agenda, org-roam, etc. Lot's of these TUIs from the awesome are somewhat already inside Emacs.

https://orgmode.org/ https://orgmode.org/manual/Agenda-Views.html