I'm landing on Svelte and Tauri too.
The other alternative I dabble with is using the Android Studio, XCode to write my own WebView wrappers.
but for us an inhouse egui pile of helpers allow for fast applications that are closer to native speeds. and flutter for mobile (using neither Cupertino or material)
It’s not great but there’s just no momentum or resources anywhere to work on native anymore outside platform specific libraries. Few people want to build an app that can only ever run on Mac or Windows.
Many such applications are accessible on the web, often with the exact UI. They may even have a mobile/iPad version. They may be big enough that they have a design system that needs to be applied to in every UI (including company website). Building C++ code on all platforms and running all the tests may be too expensive. The list goes on.
Offering a web app is indeed not trivial. Maybe Qt WebAssembly will be a viable option if I can optimize the binary and users wouldn't mind first long load time (and then the app should be cached for instant load). Or maybe I could build a read-only web app using web technology.
Currently, my focus is building a good native application, and I think most of my users care about that. But in the future, I can see how a web app could be useful for more users. One thing I would like to built is a web browser that could load both QML and HTML files (using regular web engine), so I could simply deploy my app by serving my QML files without the binary over the internet.