The proper place for old toilets is to be ground up for new roads.
With the shortage of water that is usable, it only makes sense to get rid of the old stuff.
That is why water utilities are giving rebates now to preserve what little water they have left.
Don't forget the energy it took to make the appliance you're buying new. It takes a lot of energy to mine the ore, produce the steel, fabricate it, ship it around, etc.
Getting rid of useful equimpment that provides no other benefit other than energy efficiency is for the most part a net energy, and money, loss for a long time.