What is the point of more answers? If they contradict, they're no help to you and if they're the same, then it's only people saying the same things over again.
In 2008 a challenge was issued to anyone who thought they could recover data from a single pass zero filled drive - even up to government agency (NSA, CIA) would have been accepted to see if they could recover even a file name, let alone contents. Nobody was prepared to attempt it.
Really, unless you have a legal obligation to certify to someone that a drive has been wiped to a specific requirement, all that matters is whatever will make you feel satisfied. Do that.