Git is not a blockchain. Most importantly, it’s not distributed. There’s a singular git server that all git clients for that repository connect to and use as a source of truth.

It is unfortunate, but there is also reason to be optimistic. It’s clear that they want to make use of existing items, especially under-utilized ones from previous releases. It’s something that they’ve repeatedly talked about over the past year. It’s even one of the design principles from Jeb’s internal handbook. Take copper: added in 1.17, used for brushes in 1.20, and used for copper bulbs, doors, grates, and trapdoors in 1.21. They even briefly played with copper horns in Bedrock. Or tuff: also added in 1.17 as a totally useless block, with variants fleshed out in 1.21 that makes it surprisingly useful for building. Not to mention the crafter and potions of infestation/oozing/weaving are entirely made from existing items, or the new paintings that don’t require any new items at all. Even completely new items are tried to have as many uses as possible from the start: wind charges have tons of different applications. I think Mojang has been paying attention to this trend for longer than most of us have, and we’re finally starting to see it shift how they approach update design.

On the other hand, spontaneous generation was very much still a thing at this point, so a lot of the basic rules of the world around us were really not worked out yet

SVN, and whatever that thing Microsoft was doing once