Very interesting conversation! I never really thought about the various ways the term could be used.
I have always used JBOD to describe a bunch of disks in an expansion storage cabinet that did not have a hardware based RAID controller built-in.
You could access the drives independently or use software RAID for some, if not all, of them. The logic of controlling them would be external to the cabinet itself, therefore it's a collection of "just a bunch of disks."
Steve