• Multiple Owners and Authors Assigned To Item

Ability to assign multiple Owners (“Added by” field) (similar to how we can with Tags and Categories) to an item as there could be multiple contributors.
This would need to flow through to the customer-submitted content process. Particularly where you have “Anyone can edit items” enabled so multiple editors/contributors are recorded against the item.

Or perhaps there are two fields; 1) ‘Added by’ - single source, the original owner, and 2) ‘Contributors’ - multiple sources, anyone editing the item.
This way the current field can stay as is while a new field is introduced.

And same for the ‘Authors’ field.