I mean, in those cases they're almost always just using multiple users as a proxy for job authorization levels, not people. Anybody who is serious about securi

I mean, in those cases they're almost always just using multiple users as a proxy for job authorization levels, not people. Anybody who is serious about securing a single physical machine for multiuser access isn't doing it through multiple OS accounts, and is slicing it up by VMs, instead. I do have a home (Windows) computer that gets used by multiple family members through accounts, but I think this isn't a common real world use case.