[logicprog]

You can make even lighter weight and just as keyboard driven GUIs. The only downside, as you say, is them not integrating with Tmux.

[regexorcist]

Projects like opencode are making the distinction between GUI and TUI almost meaningless. And that "only" downside is a massive, deal-breaking one. At this point I only have a browser besides the terminal, and I can see that going away soon for the most part thanks to LLMs.