So I have learned to be open minded. I was into smartphones before many others (Nokia 9000i, Treo 650, Windows) and then got out of them to spend a decade or so "off grid", then I decided to buy a house and so the "killer app" was mapping, navigation and emailing while moving around. Then had smartphones again for years.
Currently I'm tending to go minimalist more with just a smartwatch.
The point is we change, our needs change, it is not just technology changing. Chances are the phone in your hand now, at some point in your past you'd have said the same as "I have no need for a smartphone, expensive, all I do is talk and text". I also remember the move from analogue to digital phones and the "I don't need digital, all i do is talk", and before that "what's wrong with walking to the end of the street when you can put 2p in the callbox", before that was "why do you need phones, we can write letters!".
We all do need innovators and either the rich or the gullible to be buy the expensive stuff, help fund, shake out bugs and the cost drops, some benefits appear we not thought of.
Today's "don't need a folding phone".... 30 years ago it was "stamps taste horrible when you lick them".