[chucker]

Originally Posted by PB PM It’s always been there, in disk utility… Just run it from the recovery disk, select zero all data, done. User data could be done by deleting the account.

This is probably a streamlined version that:

• deletes the entire non-system volume (since the system volume is read-only and sealed, there's nothing custom on there no matter what*)
• *) except with SIP disabled, in which case I presume this feature won't work
• and then it creates a fresh user partition, hooks it back up to the same volume group, and creates a fresh user account