The thing about technology is it arrives when it does for a reason. With computing, a lot of it is tied to processing power. Could a blockchain for a social network exist 15 years ago...was there enough processing power at an affordable price to allow for decentralized networks processing a blockchain like it does now?

Certainly the fact that Microsoft dominated for so long followed up by the Google and Facebook monopolies moved people away from the decentralization of Linux, as an example.

Now is the time for blockchain to flourish...and it is very exciting.