They also probably mean TUIs, as CLIs don't do the whole "Draw every X" thing (and usually aren't interactive), that's basically what sets them apart from CLIs.
It’s surprising how quickly the bottleneck starts to become python itself in any nontrivial application, unless you’re very careful to write a thin layer that mostly shells out to C modules.
example: `ranger` is written in python and it's freaking slow. in comparison, `yazi` (Rust) has been a breeze.
Edit: Sorry, I meant GIL, not single thread.