Have you also used Acme (non-trivially)? The UI makes heavy use of text (the whole thing being a text processing environment after all) but the graphical aspect is highly significant, and most of the (fairly complex) interaction is via mouse.

The Plan 9 userspace excels at tying text-using utils, but the traditional Unix CLI is not the means by which you tie them. Even the terminal is quite far removed from a typical command line.