Blockchain technology is going to change everything: the shipping industry, the financial system, government … in fact, what won’t it change? But enthusiasm for it mainly stems from a lack of knowledge and understanding. The blockchain is a solution in search of a problem.
Yeah, git is more of a block tree, but the commits have a commitment to the previous commit, so there is still an underlying chain!
It’s true there is no consensus feature, though, I would argue that it’s a component of a cryptocurrency, instead of a Blockchain, but it’s all semantics. I could even argue that signing commits, can create a global consensus.
“Bitcoin cash” and the other Bitcoin-derivative-forks are basically “remote heads” for Bitcoin.
Idk exactly about GNU/Taler, but I concede that Blockchains are not essential for cryptocurrencies, or even decentralization, but it’s just that they’re common features