Haven’t been updated at all??? That’s very much not true. There’s so much going on in terminal world. There are many flavours of modern terminal emulators, multiplexers, shells. There’s a ton of sophisticated terminal oriented software like Neovim for example. Pretty much every single part of terminal environment has now feature-rich, performant and safer alternative implementations. The terminal and CLI world is thriving. Almost none of that massive cumulative effort is directed towards the mouse support. I really think it’s just not what people want.
I was referring specifically to “tab only GUI”. I’m sure a proper keyboard only GUI can be great.