>> So what happens ten years down the road with all of these EV “Junkers” that cannot be resold? <<
Well, the scrappers could fix the batteries and put them back on the market. Pretty much the same that happens to most 10-year-old “junkers.” We’re not talking about this like it’s the NORMAL state of affairs.
If they didn't weld together a thousand or so D cell size batteries into a single cell maybe they would be more repairable. They could definitely e more modular maybe look into resizing these tiny cells into something more repairable.
Knowing Tesla, if some put a replacement battery in their car that wasn’t made by or refurbished by Tesla, they would probably brick the car.
Some independents already do this, refurbishing battery packs and installing them on customer's EV's.
Redwood Materials is in the business of recycling EV batteries for many auto makers. They don't refurbish the packs. What they do is salvage good batteries and put them to use in lesser products, such as golf carts, forklifts, and storage systems. The batteries that can't be used are reduced to their material elements and used in manufacturing new batteries, similar to how lead-acid batteries for ICE vehicles are recycled. There is no reason to junk EV batteries in junkyards or landfills, they can be recycled now by existing companies.