I think developers often want to find a “one true cross platform toolkit for all cases” and I don’t believe that will ever exist. It depends so much on both your app/market but also the skills and experience within your team. No 1 priority is move quickly. Flutter is brilliant, and probably the way to go, for some apps. A great example of a successful Flutter app is the Sonos app, relatively simple and responsive ui…
I've been wondering why webviews with native page transitions aren't a more commonly used thing. It improves the UX a lot by dealing with the abrupt navigation changes of regular web apps. There was a plugin for Cordova that did this ( https://github.com/Telerik-Verified-Plugins/NativePageTransi... ) but it's abandoned.
You render your mobile web view like normal, wire up a JavaScript handler (formerly known as Turbolinks), and push native screens on iOS. It works really well for CRUD and "boring" SAAS apps with little interaction outside of forms. And when you need higher fidelity dropping down to SwiftUI or UIKit is straightforward.
https://github.com/hotwired/turbo-ios
To make things even simpler, I built Jumpstart iOS, which takes care of all of the Swift boilerplate. Navigation, authentication, and push notifications all work out of the box after adding a few endpoints to your server.