> React is actually pretty good for any kind of reactive interface,

It’s a different interface and the axiomatic layers are not the same.

React expects a tree of nodes that will map to the UI and build on that to add reactivity. And that’s what the major GUI platforms do offer (QT, the web dom, Android, iOS,…).

The terminal is a grid of characters modfied by the cursor concept. It is also modal (although most TUI uses one mode). What the cursor can do, and how the grid is rendered is terminal dependent (even though most current ones try to follow xterm-256color).

Using React on top of that is a technical bad idea.