Comment by lozenge

I don't mean just adding an improved notification API, I mean they could literally allow access to the entire SwiftUI and all other iOS APIs from the web. Heck, they could allow PWAs to run in Objective-C instead of JavaScript. At that point it would be indistinguishable from a native app, except that it would not be beholden to Apple's policies like Core Technology Fee, notarisation, payment scare screens, etc ( https://proton.me/blog/apple-dma-compliance-plan-trap )