because different patterns have different side effects and hence misapplying different patterns could yield different degrees of impact. Can’t speak for the parent commenter but cqrs can have nasty interplay between side effects. Commonly you would need to build interfaces that are aware of eventual consistency between read/write models, and your data scheme is definitely going to be impacted by the design choice. Versus misapplying an in-code pattern which might be an all-internals refactor to “undo the damage” it would take a lot to walk back a cqrs system.