I can’t answer from rust perspective, but just my opinion. GUI frameworks in general seem like an atrocity, you have QT and that seems like it besides proper native development and targeting 1 platform.

Java still seems like the only language with cross platform GUI and swing/awt are on the way out with javaFX being “abandoned”? (Probably not the right term but it never was made main stream). You got to Python, etc and it’s an absolute mess. C/c++ have a few but cross platform still seems tough.

Don’t even get me started on the mess of electron.