Most people don't actually want a smartphone. Pain in the ass to keep charged, carry it everywhere, not drop it, not lose it.
Everybody generally wants a few core services from their smartphone: send and receive brief messages, directions, ride hailing, listen to a podcast or some streaming service, mobile payments, take photos (perhaps most importantly).
Sometimes some people want the distractions available on a smartphone: watch video, read the news, social media, browse the web, read a book.
Sometimes some people want to Do Work™ on their phone, but the vast majority of the people don't want that, at least outside of their preferred work hours.
I try to do more and more with my Apple Watch/AirPods only, and it's starting the feel like the future depends less and less on having a smartphone. In our Star Trek utopia, your wearable would let you go up to any screen and access your stuff, and these would be in convenient locations, like a public transit stations, cafes, etc.
You'd do work on a purpose built machine for the work you do, one with a lot of buttons if you type a lot, one with a stylus and weird knobs if you do precision work.
The personal smartphone as it currently exists is this weird mandatory liability we're all burdened with, costly in time, attention, and money. They're worse than cigarettes because at least you can carry on a conversation while smoking.