Of course it's fine to ask why something like this project exists if you don't know. But I feel like the discussions tend to outgrow that and end up at "I don't need it so why should anyone care".
This is literally the first time I've ever heard of framerate/latency being a concern in a text editor.
I mean, I get that it's annoying when your machine is chugging hard and there's a half-second delay on every keypress. But generally that means that something's gone wrong and is thrashing the processor, not that your text editor is insufficiently optimized.
I know some people are more sensitive to framerate than others, in games and videos. Maybe there really is someone in the world who craves a solid 144FPS/5ms latency when editing code. But it's news to me.