My guess is that as lead acid car batteries are phased out, then the lead acid recycling industry will migrate to supplying stationary batteries. By that I mean

My guess is that as lead acid car batteries are phased out, then the lead acid recycling industry will migrate to supplying stationary batteries. By that I mean e.g. residential photovoltaics storage, grid load smoothing, battery banks for rapid charging electric cars. Situations where the weight/bulk doesn't matter, but low cost does matter. If there are no other economic uses for the lead then those applications should become nice and cheap. However this is just the opinion of an armchair energy wonk, so take it with a big grain of salt.