You asked a good question.
You're referring to the amount of time people spend on the internet - not the speed of the internet.
I come from a generation where we did not have smartphones, the internet or even personal computers.
Life was much simpler then.
The pace of life was much slower (and less stressful and more enjoyable).
If everyone reduced the amount of time they spent on the internet (by 25-50%) everyone would be happier and less stressed.
And that's my opinion... :)