Being able to roll back writes and reconstruct earlier states is pretty key for any sort of high-compliance application.

That being said, I converted a failed application that needed rollback and history from CQRS to standard CRUD with trigger based operation logging and achieved the same effect with about 1/10th the code. The architecture was a lot more accessible to lower level devs too, greatly reducing maintenance costs.

You can do that with backups and transaction logs.