Without a browser, it kind of ceases to be a smartphone. It's just a flipphone. So I don't see how that is really something you need to note.

For me it's Google Maps. There is just no comparison. I don't want to imagine trying to drive around finding places without it. It's not just the navigation and traffic, it's the business hours lookup feature and all that.

I hadn't thought about TOTP stores (Authy), but that's certainly way up there. Unless they can read a NFC yubikey.