Am I the only one reading this with one raised eyebrow, wondering if they have over-engineered this just a bit?

Pretty much everything in Git can be abstracted away as “immutable blobs that can be conveniently content-indexed” and an “event log”. The former is inherently parallel and the latter can be partitioned by repo.

The volume of metadata events that require synchronisation or similar transactional semantics seems low enough per partition to allow off-the-shelf systems to handle without a custom storage solution…