Writes are the only reason you need DynamoDB. Even then you can replicate to S3 so reads remain cheap. Only issue is transactional writes, but those can wait f

Writes are the only reason you need DynamoDB. Even then you can replicate to S3 so reads remain cheap. Only issue is transactional writes, but those can wait for S3 write confirmation in the lock. For example bank statement, ok to read from S3 SQLite file. Actual credit/debit you must use locking.