Early day Arpanet was infinitely more useful than all of this blockchain stuff.

Are there any other examples of recent + long cycle developments? Solar? Electric vehicles?

Part of me has come to expect such fast development (Facebook, Uber, Yelp!), but other modern industries must have longer cycles I just am not paying attention.

This presentation of the data suggests Bitcoin is at a "1998" level of development in terms of total number of users. I'm curious about this "number of users" metric, how would it map to adoption of other tech like telephones, televisions, cell phones, and smart phones.

1G was delivered late 1970s, 5G… 2018ish? https://www.techadvisor.com/feature/small-business/timeline-...

JWST was conceived in 1996: https://en.m.wikipedia.org/wiki/Timeline_of_the_James_Webb_S...