There is a lot of overlap here with the authoring process of a Word document. You don’t necessarily want the real-time coauthoring experience offered by Microsoft SharePoint or Google Docs., this can inhibit your ability to determine who is responsible for specific changes to content. Branching offers a much clearer audit trail of changes. Like with code, tags can be added to signify a minor or major version of a document is ready to be published.
Justin Johnson's lecture on Attention [1] mechanisms really helped me understand the concept of attention in transformers. In the lecture he goes through the history and and iterations of attention mechanisms, from CNNs and RNNs to Transformers, while keeping the notation coherent and you get to see how and when in the literature the QKV matrices appear. It's an hour long but it's IMO a must watch for anyone interested in the topic.
[1]: https://www.youtube.com/watch?v=YAgjfMR9R_M