How many Teslas have actually done half a million miles?
I read about one that had done getting on for that, and was exhibiting a charging issue so was checked out by Tesla. The problem was a software fault, which was sorted, but Tesla replaced the battery pack anyway.
The thing is, those packs will be recycled into home storage packs and other storage formats, the high-mileage Teslas like the one I read about are rental cars shuttling between LA and San Francisco, so long, steady runs, exactly like high-mileage, low stress IC engined cars.
A (smallish) modern petrol engine will happily tow a caravan.
Of course it will, but not in a small car, unless it’s one of those little folding ‘vans, the weight of the ‘van and the kerb weight of the car have to correspond, for fairly obvious reasons.