>which might mean needing to revoke a bunch of passwords That doesn't help much because many people use patterns to their passwords and use the same passwords

>which might mean needing to revoke a bunch of passwords That doesn't help much because many people use patterns to their passwords and use the same passwords elsewhere. Seeing the expired passwords of many important people would have a very high chance of having a few which would be of use in breaking into accounts even if they were already expired.