Htop is an example of a good TUI but it doesn’t really look like a traditional “drawn” GUI.

I think that is the distinction that parent is making.

In a TUI environment (ignoring mouse support) traditional GUI elements and layouts often don’t make sense. Like one of the examples with all the radio buttons in small boxes.

The good TUI apps like htop, newsboat, mutt, vim/emacs, tmux all have mostly line-and-column oriented simple layout primitives.