Right, but it's also hard to define the "majority" and "minority" coin here. You could define "majority" based on "most hashpower", but say that chain is being

Right, but it's also hard to define the "majority" and "minority" coin here. You could define "majority" based on "most hashpower", but say that chain is being mined exclusively by the 3 largest China-based miners, would it still be considered the most valuable? Or maybe only by one miner, like when ghash.io was over 50%? If the exchanges don't support the concept, it'll still at least be up to the user to figure out which chain the exchange is on.