Option C: recycle, even if it is not cost effective. Lined landfills can also eventually leak. Overstuffed warehouses and lined landfills also cost money, so just do it the right way. Someone needs to invent a system that can chop up all modern electronics and melt it all down and sort out the different materials for reuse. But since that probably isn't practical, just pass a law that all electronics are a) repairable, preferably with replaceable modules, and b) easy to recycle when no longer worth repairing.