Quantities "on hand" adaptating when variants are a sub-product of the main product

We had again a user today (after some others we didn’t mention here) who are facing this issue, especially hubs/farmers who sell to wholesalers in big quantities and in small to individuals but would like both variants to take from the same stock as they have one stock of the product regardless the conditioning per Kg or 5Kg for instance. I’m wondering if there is a way to move that forward before we implement the product chain logic (which will take months… and stock will only be tackle on further iterations). Shall I put that as a voting candidate so we can prioritize and see what quick win we could find (if we decide to prioritize ?). @Rachel and maybe @sauloperez and @luisramos0 who have a bit dived into the product chain thing, what do you think ? (and others if you want of course ;-))