Thank you for the great question.
Simply put, I do not know if there is any benefit for the plants to be housed with one another in one area, but I have this (unsubstantiated) belief that plants in close proximity have a symbiotic relationship, and if one plant is sickly, it can affect the other plants, directly or indirectly.
Directly with parasitic things, or indirectly on in terms of environmental (energy) based factors.
I just successfully designed my own micro greens planter for lettuce, and intend to fill that little closet up with all sorts of plants soon.
Have a great day my friend.