Benefit of TUIs is that sometimes they are extension of CLI.

Sometimes I can use `du` to check what uses so much space, but sometimes ncdu is better for me.

And the best part - I can use both when I ssh to another machine, using the same command line, without thought. While GUIs need added thought, to switch from CLI to GUI on the remote one would need to use a different interface, or have X11 forwarding on (which is also a good option) and x11 libs on the other side.

Or use some other connectivity. ssh is simple, works on most servers I have access to.