As a law student in 1980-81, I wrote a custom user manual for the law review editors and our admin to use Emacs and Brian Reid's Scribe formatter (on the Computer Science Department's TOPS-20 machine using a VT-100 terminal over a 9600 bps line). I was the only even-remotely technical person on the editorial board, but even so, we were all in heaven: Once manuscripts were typed into Emacs / Scribe by our admin, we didn't have to literally cut, paste, hand-mark, retype, etc., on paper as the editing process progressed. And it speeded up the production process because we sent "clean" edited manuscripts to the printer, as opposed to manuscripts with significant pen-and-ink proofreader marks; this dramatically reduced the time we spent reading and correcting galley proofs. (Electronic transmission to the printer was next on the experiment list but we graduated and left.) I'm sure that's why I've been an Emacs user ever since, and wrote keyboard emulators for WordPerfect and MS Word.
But its very possible -- I never interacted with any non-programmer Multics users.
As for time sharing: ITS stands for “Incompatible Timesharing System” (a joke on CTSS), with memory protection, etc used by multiple users on terminals and over the net starting around/before the Multics project (all of which preceded Emacs of course)
ITS version 1 is counted from 1967 as well (first mentions of PDP-6 ITS), simply because Project MAC couldn't deliver computing resources needed by other groups, not to mention AI Lab tended to modify the hw all the time (a fate AFAIK common to all ITS systems).
The anecdote about secretaries extending Emacs came from RMS, describing a group that used the shared "utility" computing resources provided by Project MAC (later turned into LCS) and who used a manual that didn't mention the word programming, compiled by who-knows-who, which showed how to modify Multics Emacs (which was the second Lisp-based Emacs) to user's liking.
Emacs was famously used by “secretaries” (as they were referred to in those days) not only to write documents and mail but to write macros to make their lives simpler. Of course none of them could “program” (which was considered quite intimidating) but they didn’t consider writing Emacs macros to be “programming”.
Back then Emacs was written in TECO so writing actual libraries was pretty arcane and not as easy as it is today.
But I’m glad the learned helplessness around programming has largely ablated, in part through improved tools and in part through simple acceptance.