A little off-topic, but having used Raycast a little on a mac, I have to say that I wish there was react-native on Linux. It seems likes the react-native desktop project is maintained by microsoft, so there is no incentive for them to port this to linux, but what would it take to do that? Does anyone know? It seems to hinge on GTK and QT being hard to integrate with.
They have the same incentive as with supporting mac with react-native-macos, more platforms to push their services onto. The limitation seems to be technical, as other react-native on QT projects seem to have been all abandoned (Valence Native being the big one mentioned on react-native docs).
The problem with porting gui libs to Linux is - what is "Linux GUI"? Likely you would want to port it to either Qt or GTK; other routes might be a bigger lift.
Fwiw, React Native for Windows targets WinUI & for macOS targets UIKit (though Microsoft's work here builds a lot on Facebook's work targeting iOS).
I personally don't think this is "the problem". Every platform has more than one UI library: on macOS you have AppKit, UIKit and SwiftUI. Windows seems like the worst offender with WinUI, WinForms, WPF, Blazor, .NET MAUI, etc [1].
I do think it's just a incentive issue. Supporting a platform on React Native takes plenty of effort, so without a big app as both the motivation and test-bed figuring this out there's little reason to invest in it.
Every platform has more than one UI library but there's two (closely related) fundamental differences:
1) there's typically just one canonically recommended for a given use case at a given time
2) they tend to a better job interoperating with one another & conforming to a consistent desktop paradigm than popular Linux equivalents (see e.g. running qt apps under gnome)
This is all largely because they come from singular entities - achieving the above would require more effort & coordination from Linux folk (though KDE do a decent attempt - Gnome has a lot to answer for here).
A TUI target for React-Native would be nice, but Ink gets pretty close (it builds on Facebook's Yoga lib to provide React terminal components - it's not a full "menu/window/view managing" type TUI lib but Yoga is the CSS Flexbox re-implementation behind React-Native, so building a layout is pretty straightforward).
