Comment by this_user

A blockchain is just a type of data structure. I have yet to see any use case, outside of building crypto currencies, that could not be realised without it. The problem is not that the technology did not exist before, the problem is that people and organisations were slow or unwilling to adopt it. But that is not the type of issue that will be solved by introducing new technology, and almost all blockchain advocates seem to completely oblivious to these dynamics of human behaviour.