Frankly, you get most of the claimed benefits of blockchains by just putting the transactions in git, which is very fast and efficient, and there's a ton of too

Frankly, you get most of the claimed benefits of blockchains by just putting the transactions in git, which is very fast and efficient, and there's a ton of tooling relating to copying git repos around and using the hashes in them and so forth. And doesn't use as much power as Ireland.