I've been using the editor since the early days and have always been a fan of its visual look and feel, so I was pretty happy to see its UI library open sourced.

I wish GPUI could become the go-to Rust UI library and not just an editor backend.

For that, a couple of changes would be highly desirable: being able to switch the GPU backend from Metal to wgpu (so it could be mixed with vello, for instance), and the ability to integrate into an existing event loop like egui allows you to. If this were easy to do, I would switch from egui in a heartbeat.