Really, they're just a GUI drawn with Unicode instead of drawing primitives.
Like many restrictions, limiting oneself to just a fixed grid of colored Unicode characters for drawing lends itself to more creative solutions to problems. Some people prefer such UIs, some people don't.
Some people will be like you save two seconds trying to do something simple. You lose more time building the tool than you will use it in your life.
It's not about saving time. It's about eliminating the mental toll from having to context switch(i know it sounds ai, reading so much ai text has gotten to me)
This broke my brain! Woah!
Or mouse / trackpad.
I really haven't seen anything better for making TUIs than Borland's Turbo Vision framework from 35ish years ago.
Peoples definitions will be on a gradient, but its somewhere between CLI (type into a terminal to use) and GUI (use your mouse in a windowing system), TUI runs in your terminal like a CLI but probably supports "graphical widgets" like buttons, bars, hotkeys, panes, etc.
I never heard "TUI" until the last few years, but it may be due to my background being Microsoft-oriented.
One of the only references I can find is the PC Magazine encyclopedia: https://www.pcmag.com/encyclopedia/term/cui
I’m fairly certain this terminology has been around since at least the early aughts.
https://en.wikipedia.org/w/index.php?title=Text-based_user_i...
Norton Commander (or Midnight Commander) is probably the quintessential example of a powerful TUI; it can do things that would be quite hard to replicate as easily in a CLI.
https://books.google.com/ngrams/graph?content=TUI&year_start...
Basically it was never used, then it was heavily used, and then never used, and then in the early 00s it took off again.
That'd explain why you used it, I never did, and now young kids are.
It's not a term I recall hearing at all when I started using computers in the mid-'80s - all that mattered back then was "shiny new GUI, or the clunky old thing?" I really thought it was a retroneologism when I first heard it, maybe twenty years ago.