Firstly they are either broods or supers. Both are deep boxes and shallow boxes are often used as brood boxes (brood and a half set-ups).
Using an extra-deep box as a super, in any format, makes for a different approach to one’s beekeeping. The in-betweens go for the Rose system of one size for both brood and super (honey box).
I found that an extra deep, used as a super on OSR, was a superb way to get 14 x 12 frames drawn exquisitely even. Before that some outer frames were often not drawn out completely except on very strong colonies.
Extracting tangentially was a pain - but one did get a lot of honey from each set of three frames (and 12 Hoffmans in a National format box was obviously the one to choose).
I’ve overwintered a 14 x 12 National hive in two tiers of 6 frames (in modified Modern Beekeping Langstroth jumbo nucs). Worked very well except it needed a spacer (eke) between the boxes, as I recall.
I may have made up the full 12 frames with a couple of frames of stores from another hive or it may have been a couple of un-extracted frames of stores (I don’t feed sugar as winter feed unless really necessary).
Apart from the weight issue, getting a full box later in the season may be an issue. I would not add an empty jumbo anything, as a super, either early or late in the season because of the extra unused space and colonies rarely need more brood space than a single 14 x 12 brood.