Interesting, didn’t know that was a thing! Given their reasons for choosing Swift, I was curious why he didn’t discuss Rust. Later in the video he mentioned they started this project in 2017, which may partly explain it: it was only around that time that Rust really started to get traction, whereas Swift came out of the gate with fanfare and accolades. That also means they started this effort before SwiftUI had been announced.

Their approach to app also seems quite different from the typical promise of Electron, Flutter, or React Native: rather than trying to apply the same UI design and codebase to multiple platforms it sounds like they’re trying to use the same toolkit to cut down on context switching but want to approach each platform with the design principles of that platform. That’s pretty cool. Some of my biggest frustrations with Electron apps come from things that are missing or implemented differently just because they don’t translate well for the Windows versions.