There is something of an unpopular ideology in Computer Science that suggests that you shouldn't build architure to use cool tools, you should build the cheapest easiest architecture that meets the user's needs. This ideology is unpopular because using cheap and easy tools isn't exciting,and we developers often can't stand writing boring applications.

Quite a few projects are using P2P, machine learning, Kubernetes, No-Sql or block-chain not because the project actually requires scalability, decentralization, advanced data analysis or responsive big data, but because somebody got excited and refused to accept that it was a waste of time and money to do so.