An interesting theme here in the comments (that I am sympathetic to) is "TUIs have steep learning curves but are fast/efficient for people with proficiency". I wonder if a small part of the modern preference for GUIs is related to a lack of employee retention. If companies aren't necessarily interested in working hard to keep employees then training new hires needs to be faster/easier and that could work against TUI and keyboard-based tools.

Of course, if that's a factor I'm guessing it's a small one in comparison to expectations about what "modern" software should look like.