Unfortunately I don't think we will see if this is how it plays out until Apple has to allow other browsers globally.
It has nothing to do with people no longer using Safari and Apple being sad about that. Other browsers can technically be installed on iOS, but the underlying browser engine is forced to be Safari, which lacks many APIs other web browsers could implement, reducing the need for a native app. It's purely Apple's anti-competitive greed that drives this situation. And the EU, Japan, and the US DOJ have noticed. So far only the EU and Japan have actually taken measures to force Apple to change this.
Here's the entire DOJ lawsuit which includes many other instances of anti-competitive practices by Apple.
https://www.justice.gov/archives/opa/media/1344546/dl?inline
No, we do not want to write our own iOS app where Apple can then extort us for a percentage of any sales through the app, and we have to pay for the priviledge to develop that app, as well as buy Apple hardware to do so.
So instead we use Wifi, where we can maintain one single codebase - the web application, which works on both Android and iOS, but has to use Wifi. If Apple allowed Chrome to use its own browser engine, we would simply tell users to install Chrome to interact with our device. Then we don't have to pay Apple for anything, nor should we have to.
Apple purposely won't implement some APIs so they can force developers to create an app for their app store where they can collect money from any additional sales through the app. It's all spelled out in the DOJ suit, why won't you just read it??
https://www.justice.gov/archives/opa/media/1344546/dl?inline