On MacOS is much better. But most of the team either ended up with locked in Mac-only or go cross platform with Electron.
You don't need to use microsoft's or apple's or google's shit UI frameworks. E.g. see https://filepilot.tech/
You can just write all the rendering yourself using metal/gl/dx. if you didn't want to write the rendering yourself there are plenty of libraries like skia, flutter's renderer, nanovg, etc
- Good cross platform support (missing in filepilot)
- Want applications to feel native everywhere. For example, all the obscure keyboard shortcuts for moving around a text input box on mac and windows should work. iOS and Android should use their native keyboards. IME needs to work. Etc
- Accessibility support for people who are blind and low vision. (Screen readers, font scaling, etc)
- Ergonomic language bindings
Hitting these features is more or less a requirement if you want to unseat electron.
I think this would be a wonderful project for a person or a small, dedicated team to take on. Its easier than it ever used to be thanks to improvements in font rendering, cross platform graphics libraries (like webgpu, vulcan, etc) and improvements in layout engines (Clay). And how much users have dropped their standards for UI consistency ever since electron got popular and microsoft gave up having a consistent UI toolkit in windows.
There are a few examples of teams doing this in house (eg Zed). But we need a good opensource project.