I disagree that there’s no way to implement an alternative to Safari, besides Chrome there’s also iCab and other browsers that show not only a completely differ

I disagree that there’s no way to implement an alternative to Safari, besides Chrome there’s also iCab and other browsers that show not only a completely different UI but also innovative new features. Even if WebKit makes it impossible to remove this restriction, a third-party browser could find a way to intercept calls and keep its own local storage, read and backup native local storage, or provide other means to local storage via proprietary JS APIs, and if that browser is Chrome, it will gain traction. Especially if Apple changes iOS to allow users to change default apps.