[MM3-users] List description as sender

When receiving a mail from Mailman 3, the From: User name is the description of the list, like From: Long desription of the list for all members of certain project <project@lists.example.com>.

Starting to get old, I recall something about a discussion we once had on http://mail.python.org/pipermail/mailman-users/, but I don't recall the reason for this and I can't find the discussion, so it might be something I dreamed.

What was the reason for implementing this? And could it be a selectable choise in Mailman 3?