I think I got my first smartphone when I was 23, I never use them for anything other than calling, youtube, and basic web browsing
My typing speed on a phone is something like 15 wpm, on a computer keyboard it's 110 wpm
The idea of using a smartphone for anything pleasurable (other than youtube) is totally foreign to me
Both Android and iPhone just allow you to use the camera app now. You just tap on the QR code and it shows the content/link and you can tap on the link to go to it.
It's the reason why the last couple of years it has taken off.