Post editors are not suggested recipients for @-addressing

Question

There is no username popup suggesting completion when typing an editor's user name prefix.

Steps to reproduce:

1. Find a post by AUser that was edited by UserB
2. Write a comment addressing @UserB

Expected results:

When having typed @U, the completion popup should suggest @UserB

Actual results:

No popup, as if there were no such user in the list of addressable users.

---

The Meta post on this feature states; while referencing this answer:

Notifications apply to the author, commenters, and editors of the question or answer that you are commenting on—users not in that list cannot be notified. You can also notify a ♦ moderator who closed the question.

The popup can easily be seen as an indicator whether the user whose name I'm typing will receive my message, since, while typing a user's name and the name disappears from the suggestion list, it means I mistyped and the user will not be notified.

This behavior suggests that editors will not be notified at all, while they actually are. This is why I classified this as a bug.

Answer 1

Quoting myself from here:

The autocompleter only autocompletes actual commentors. We decided to not autocomplete editors, because

a) it's a very rarely used feature,
b) it'd be quite some work to make this work nice performance-wise, and
c) it would probably be more confusing then helpful ("Who the hell is this User12345 and why is he in my autocomplete list?").