That is my point, in principle the purchase of a 30kW Leaf battery and swap into a 24kWh car should be for the most part plug and play. Over simplifying entirely but to go back to the bmw analogy, swapping out my 4 pot 528i engine for a 6 pot might present a few issues.
I understood the form of the casing had not changed, and remembered seeing a complete battery unit for sale on eBay a while back, hence the idea. However also from memory Nissan we’re offering replacement refurbished batteries in Japan for about £2000 about 90% of the original costing for a pack. I don’t know if that ever came to anything, but it would be a shame to see so many older cars which are limited to being shopping cars, by an unusable range. For what in principle should be a relatively straightforward piece of work.