But schemaless does not help migrating the data from structure A to structure B. Consider, that in this case, the json text field is schemaless. How is that di

But schemaless does not help migrating the data from structure A to structure B. Consider, that in this case, the json text field is schemaless. How is that different from other schemaless databases? If anything, you should state that if you wanna avoid alters, use CQRS, not just shcemaless