[Terr_]

> It's pretty clear that the security models designed into operating systems never considered networked systems.

Having flashbacks to Windows 95/98 which was the reverse: The "login" was solely for networked credentials, and some people misunderstood it as separating local users.

This was especially problematic for any school computer lab of the 90s, where it was trivial to either find data from the previous user or leave malware for the next one.

Later on, software was used to try to force a full wipe to a known-good state in-between users.