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I doubt that this is true (about smartphones). "Today they're ubiquitous. Many who carry them would never touch "a computer."
There simply isn't big generation left that is so old they don't want to use computers. Not in the west. If you're seventy years old now, you were forty when computers came in. Like my dad, plenty young enough. My dad-in-law was ten years older, and he skipped computers. But then, he skipped mobile phones. Over 90% of Dutch people use computers every day. The remaining 10% is definitely not the demographic that uses a smartphone instead, like my dad-in-law. Just like these days the kids really don't know more about internet than their parents: their parents started using internet when they were in their twenties, and their kids know less.
And in the third world, the people who use mobile phones instead of computers aren't using smart phones. They cannot afford those, so they mostly use feature phones. Or, since very recently, those Asha wanna-be-a-smartphone feature phones that are such a huge success in India. And they still want to use real computers instead.
I agree. My in-laws are in their 70s and were given a computer to use (not too old, still ok) and multiple people sat down with them (on different weekends) trying to find ways to explain things so that they would be easier.
They did figure out how to use it and were just bored with it. Then I took my iPad to their house and they thought, at first, that it was just a photo viewer but then they saw all the other things I could and were very impressed and took to it like, "fish in a pond".