> There will always be a small percentage of situations where '1 person = 1 account' will never be true. I agree, but this isn't an argument against the obsole

> There will always be a small percentage of situations where '1 person = 1 account' will never be true. I agree, but this isn't an argument against the obsolence of expiring passwords regularly. I imagine people sharing passwords are even MORE likely to share passwords in insecure ways if they are forced to change the shared password at a regular interval.