Use of NO-NOSELECT in mail_location

I enabled NO-NOSELECT in mail_location as it seemed to be an optimization without negative consequences. The wiki states

NO-NOSELECT : Automatically delete any \NoSelect mailboxes that
have no children. These mailboxes are sometimes confusing to
users. Also if a \NoSelect mailbox is attempted to be created with
"CREATE box/", it's created as selectable mailbox instead.

The last sentence is important: if you allow this, you won't be able to create folders (i.e. directories); this caught me offguard. If you use mbox, this is something you don't want to enable.

Joseph Tam <jtam.home@gmail.com>