Most of this codebase seems to be Rust. I'm not sure how good the Qt/Rust experience currently is; there might well be room for another player in that space.

More generally, I get the impression that the current state of the art in cross-platform desktop-first UI development leaves a lot to be desired, so, tentatively, I applaud any and all efforts in this space, especially the ones that attempt to implement something from the ground up, rather than introducing unnecessary layers of leaky abstraction.