[raphlinus]

I'd recommend wgpu. It should be a fairly easy migration from Metal, as Apple has been actively involved in the design, and there are similar concerns for developer experience (unlike, say, Vulkan).

Unfortunately, graphics is in many ways the easy part. Really excellent integration with system menus, preferences, keyboard, input method editing, all have more variation across platforms and a still-evolving story of solid Rust abstractions. Lately, we've decided to try joining forces with the winit project to see if we can get those problems solved well.