He was around 40 years old when he said it and he wasn't talking about smartphones - at least what we call smartphones today.
> "I have always wished for my computer to be as easy to use as my telephone; my wish has come true because I can no longer figure out how to use my telephone".
> I said that after a frustrating attempt to use a "feature-rich" telephone sometime around 1990. I'm sure the sentiment wasn't original, and probably not even the overall phrasing; someone must have thought of that before me.
> "I have always wished for my computer to be as easy to use as my telephone; my wish has come true because I can no longer figure out how to use my telephone".
> I said that after a frustrating attempt to use a "feature-rich" telephone sometime around 1990. I'm sure the sentiment wasn't original, and probably not even the overall phrasing; someone must have thought of that before me.
https://www.stroustrup.com/quotes.html