This is a great question! I believe we have already reached this plateau. Being that the world today is so deeply based on internet access for even the smallest need, unless you just live in the backwoods somewhere disconnected from the world entirely and totally self sufficient or independently wealthy and carry the money around in a shoebox, the need for internet is a must have.
I am not talking about a total net footprint with all the gadgets and features, i am talking about just the very basic conforts and existance in the average environment requires some kind of internet access. We have become so used to using the internet that many times we use it and dont even realize we are using it.
There is real danger here and it is probably one of the most challenging times we have ever faced as a world. What happens when/if someone flips the switch and everything is turned off or is taken over. Noone knows how to do stuff manually anymore, that is a lost trade in many ways. Noone knows how to get things done without the 0 and 1 and with every part of our utilities and basic functions being so codependant on binary, all it would take is one disaster and everything would just stop!
Think about other societies of the past which have relied so heavily on one particular thing. Regardless if it is a annual herd movement, a river, traffic, food source, climate, or other need that sustains them. If that need disappears, changes or is challenges in any way, the breakdown comes from within and its like a domino effect.
I think we are certainly in for some challenging times as a world in managing that dependency.
Think about the great potato famine, even though it was about 170 years ago it speaks volumns. People were so dependent on potatoes that when the crop was taken away through disease it totally devistated society. Think of the internet as our current potato.