I want to be able to schedule a meeting with someone else at my company in as few steps as possible.
It looks like the Quick Add feature used to auto-invite email addresses that you included in the event text: https://webapps.stackexchange.com/a/26880/127103. This no longer seems to be the case.
Was this removed? Any way to bring it back? Any other ways to quickly schedule with a certain person?
Best Answer
It seems that functionality was removed in the latter half of 2013 or early 2014.
Compare these pages from the Wayback Machine:
Google Support: About the 'Quick Add' feature - captured 2013-04-04
Specifically mentions using an email address as part of the string.
Google Support: About the 'Quick Add' feature - captured 2014-04-21
You'll note that where it used to see you just needed to include "What, When, Who, Where", it now just tells you it needs "What, When, Where".
I don't know why it was removed. I suspect because it was too easy for people to get spammed with event invitations they didn't want.
To invite people you need to use the full event editor.