[belter]

The article is about ACID, both consistency and isolation not just about consistency and you can't isolate them (pun intended). The underlying of the discussion was not on consistency, instead on the possibility of using DynamoDB where you would use a typical relational engine.

From the article: "The textbook definition of ACID Isolation is serializability (e.g., Architecture of a Database System, Section 6.2), which states that the outcome of executing a set of transactions should be equivalent to some serial execution of those transactions. This means that each transaction gets to operate on the database as if it were running by itself, which ensures database correctness, or consistency."

" This means that each transaction gets to operate on the database as if it were running by itself, which ensures database correctness, or consistency. A database with serializability (“I” in ACID), provides arbitrary read/write transactions and guarantees consistency (“C” in ACID), or correctness, of the database. Without serializability, ACID, particularly consistency, is generally not guaranteed"

I am of course ignoring the Consistency you are certainly aware that exist in DynamoDB with Strong Consistency and DynamoDB Transactions.

Moving consistency management outside of DynamoDB as you propose doesn't circumvent the CAP theorem's limitations.