I empathetically agree with #1 but object to #2. Datomic, on an architectural basis alone, is going to be strictly faster than say an RDBMS, because it can para

I empathetically agree with #1 but object to #2. Datomic, on an architectural basis alone, is going to be strictly faster than say an RDBMS, because it can parallelize almost all of the workload. Read-side is entirely elastic; index and storage maintenance does not block the writer, and the single operation that must be serial is the actual ACID write primitive, the conditional-put to DynamoDB. In RDBMS, the ACID writer is competing for resources with all these other operations, because they can't be parallelized without sacrificing consistency.