I suspect that a native GUI, or even something like GPUI or Flutter would be still more performant than TUI's, which are bound by the limitations of emulating terminals.
A very important thing about constraints is that they also liberate. TUIs automatically work over ssh, can be suspended with ctrl-z and such, and the keyboard focus has resulted in helpful conventions like ctrl-R that tend to not be as prominent in GUIs.
Just dropping this here because I had no idea about/ignored tools like this until recently, in case you weren't aware of them, but it's been a big help in my workflow https://github.com/atuinsh/atuin
