>Actually, I expect to start seeing immutable databases applied to some of these use cases in no time: > To immutably store every update to sensitive database

>Actually, I expect to start seeing immutable databases applied to some of these use cases in no time: > To immutably store every update to sensitive database fields (credit card or bank account data) of an existing application database. Would this cause legal issues, for example, with GDPR deletion requests? I can't imagine that regulators would accept the answer "Sorry, my database doesn't allow me to delete data". So then you would need a way to make a "real delete", which seems like it might erode the benefits described.