The great drawback of TUI app is that are quite unusable from touch devices, or generally devices without a keyboard). If you find a way to make them usable on mobile I think they can get a great comeback
If you can find a way to make touch-friendly interfaces useful on desktop devices with a large screen and a keyboard maybe then they'll take off.
Better yet, make all user interfaces the same as a toaster. Everyone can use a toaster. Bread goes in, push the lever. One universal way of thinking for everyone and everything. No domination by the tyranny of choice.
