I’m one of those people who is entirely happy wit Apple’s default apps, but the opportunity to change “default apps” (such as the browser, email client, and so forth) is one of the things I have always looked forward to and am hoping that will come through on iOS/iPadOS 14 (if the rumours are to be believed).
The funny thing is that the elaborate process (including the jailbreak) he went through to “change his default browser” didn’t really change his browser since all ‘browsers’ available for iOS are actually mandated to be implemented as Safari webviews. So he might’ve changed the chrome and the collateral features, but he’s still using the Safari/WebKit rendering engine.