You said you "hope good desktop GUIs will come eventually, because I absolutely hate the web-based stuff like Electron.", so I guess you still might need to use those. I'm with you, and I'm trying to be part of the change. To be honest, I'm not very much tied to a specific programming language. If the end result is good - stable, performant, with good DX than I'm with it. For me, the current combo works. I'm willing to adapt tho. Slint has nice QML syntax for UI and logic (and the underlying framework) is written in Rust. Its author was once The Qt Company/Nokia developer if I'm not mistaken.