Read your own article.
Those technologies with “last mile” problems—bringing electricity cables or telephone wire to individual homes—appear to spread more slowly.
Technology adoption rates have always been incredibly speedy for the most popular communication media available, because humans. It’s only been slow when it involves physically laying out telephone wire across a country.
That’s why venture capitalists like to compare the cell phone to the history of the landline, and why they absolutely don’t like to compare it to radio, color television, VCRs, cassette recording tech, when they’re trying to convince people to invest in new tech, because they’re managing expectations in their favor.
Also from your own “data” that you accuse me of ignoring:
It is difficult to conclude categorically from the available data that smart phones are spreading faster than any previous technology.
You also often seem to be conflating “speed with which a particular consumer product reaches market saturation” with “frequency of new classes of new consumer products”.
Now, most of your articles making this venture capitalist argument are near ten years old. If it’s frequency you’re talking about, that must mean we’ve had a couple of major technology consumer products on the scale of the smart phone since they came out. (Not iterations, of course, but brand new classes of consumer products that are as popular.)
I’m not saying smartphones and social media aren’t having profound and novel effects on society. But the idea that earlier communications revolutions that also profoundly shook the social order weren’t adopted as quickly is bogus.
You are free to otherwise freak out about the effects of social media.