Sorry, that remark was a response (with a smile to show benign intent) to Juri's comment:

> ... this is the default behavior for completions that don't share a common prefix.

... and not a response to any of your comments.  No offense meant - I really appreciate your having spent any time responding to me!!

On Fri, Jul 30, 2021 at 11:48 AM Eli Zaretskii <eliz@gnu.org> wrote:
> From: Aaron Cohen <aaron@brightbytes.net>
> Date: Fri, 30 Jul 2021 11:20:51 -0700
> Cc: Eli Zaretskii <eliz@gnu.org>, 49761@debbugs.gnu.org
>
> Well, it's now the default behavior.  It wasn't previously.  :-)

I wasn't trying to find the reason for the change in behavior, I was
trying to help you get the behavior you want back.