Why would you assume that? I (as the 'designer' of a couple of distributed event-sourced systems), will create a message (as an event) that ricochets around to

Why would you assume that? I (as the 'designer' of a couple of distributed event-sourced systems), will create a message (as an event) that ricochets around to update several SQL and non-SQL systems that are normalized or denormalized views, or what not. When a 'delete' command (event) gets sent around, that gets accepted by subscribers/listeners, and they 'mark' their respective 'column' equivalents as 'deleted', but in an append-only log, the idea that a disk block gets updated is kind of nonsensical. The logic goes: 1) something happened. 2) we regret it - please hide it from (most) quesry responses. I know if I was dealing with an RDBMS, it's probably easy enough to delete it, but in an eventually consistent, heterogenous, append-only world, an actual delete-delete is kind of a hassle to even contemplate.