Git and secure scuttlebutt use merkle trees and chain blocks cryptographically, so yeah, they technically use a blockchain. In my opinion main difference betwe

Git and secure scuttlebutt use merkle trees and chain blocks cryptographically, so yeah, they technically use a blockchain. In my opinion main difference between "technically use a blockchain" and the term blockchain as used in the article and in common parlance is a way to automatically determine by distributed consensus which chain is the "real" blockchain. That's what proof-of-work or proof-of-stake do, and git and ssb don't provide a way to do that, so this article is not about them.