How is that a “real repo” and mine aren’t? The article this thread is about is written in Rust for the majority of the app. I linked to three cross-platform UI bindings/libraries for Rust that could’ve fairly quickly provided the same UI that the Electron portion provided. I get it some prefer Electron and that’s ok, but to say that cross-platform coding is inherently difficult otherwise is a bit of a stretch to me.

No you're not. These are cross-platform. Save for a few OS-specific things (not UI related, which would have been a problem with electron ayway), it's just about compiling it on a new OS to get it working.