I do appreciate batteries will be recycled but I am not sure if all of the contents will be of any use in ten years time when the make up may have changed
. As things stand the car makers have different ideas on the type and sized and everything else on these cars. It does seem that by the time the current cars have reached the point the batteries need replacing, there will be a multitude of batteries with specific ones needed for different cars, and while the battery costs may have dropped this incompatibility point will have pushed other costs up. If you want to replace the batteries in a current car you ae stuck with whatever the maker wants to charge as other makes batteries will not generally fit. Whatever though you are going to have a major job and I do not see the costs coming down to the point where someone with a ten year old car will will always wish to spend that sum on a car now worth not a lot more than the batteries and fitting cost.
What we need is standardisation, so as with any ICE you can recharge anywhere with out specific adaptors and the supply and fitting need for new batteries will need sorting.