[ivancho]

Except with packet switching networks I can immediately point to the problem they are solving and can also make a guess how things will change when we create 000s of bigger and better ones. And the timeline is definitely not what you are making up here - the 70s had immense development of networks and protocols, every telco was building new networks across the country, it was most certainly not hobby stuff, there just weren't that many computers until the 80s.

What problem are we solving with decentralized consensus? How will things improve if we have a giant one? Say every mobile phone was a part of the consensus mechanism, churning Turing-complete smart contracts. Billions of nodes. What do we get out of that?