The concern is also largely going to disappear in the emerging generation of batteries. LFP chemistry (available in some Teslas and supposed to be coming in Hyundai/Kia/Genesis soon) have degredation curves that far exceed a vehicle lifetime. We're talking over a million miles before the batteries reach 80% of design capacity. The downside of LFP is they don't have the energy density that standard EV batteries (NMC) have, meaning you either have to be comfortable with less range or an even bigger battery pack. GM has LMR batteries on the way also. These are a medium point between standard EV batteries an LFP. They have 30% plus more energy density than LFPs. There hasn't been extensive degredation testing of this chemistry yet, but it is expected to be well above NMC and closer to LFP. Even if its 500k miles plus instead of 1 millon, it is functionally the same as LFP since so few cars reach that mileage anyway. What's interesting is that LMR and LFP could make the pursuit of super-capacitors obsolete. The only advantage super capacitors would have is rapid charging and possibly weight, but at the speeds we have today with EV charging, it might not be worth the cost for a technology that multiple automakers are struggling to bring to market.
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