When it comes to open-source infrastructure projects like this, the first thing I generally look for is an architecture diagram on how to operate something like this.
Having a great developer-friendly API is important, but operating the system(s) is just as important and often a differentiation point of using the system (e.g. scale up some nodes, and you're good vs a mish-mash of an OLTP database, distributed WAL, a denormalized search cluster, etc).
I don't get a good sense of how this works right now with the docs.