Interesting, but I wonder if Swift and Swift UI isn't cheating, since I'd assume most of their runtime is already present on iOS and macOS for them to link against. This is also often true of all these "native" solutions. It's more that the toolkit and the runtime is bundled into the OS they target, where as Electron or Java apps bundle absolutely all their dependencies including their own runtime. Though with Java, I think you could assume the user would install those separately, and you could just to use the existing ones.