[everfrustrated]

>the lack of multiple databases per cluster

I don't think that will matter. This feels much more like DynamoDB where you're charged for GB used/stored and no infra cost, so no reason to nest databases

[Edwinr95]

Isolation can be quite important. I work with a micro services architecture, where we assign a database per service.

That makes it very easy to manage access to sensitive data.

[adobrawy]

You do not need logical database isolation if you have even stronger isolation with virtual clusters. The pricing and quota will be important factor for that use case.