You are absolutely correct, but the ratios of their availability, because they are a byproduct, all go up by the same proportion. It's hard to avoid excesses of the less useful ones with shortages of the more useful ones.
More useful ones being things like neodymium and erbium and cerium.
Once one of them is not being produced in sufficient quantity due to being a byproduct, then it gets really expensive. That's for sure.
More useful ones being things like neodymium and erbium and cerium.
Once one of them is not being produced in sufficient quantity due to being a byproduct, then it gets really expensive. That's for sure.
(edited for clarity)