So 7000 to 8000 euros to replace a battery of a 80 to 100k car?
It depends on how many miles it has driven and how much other maintenance the car has had. It's a big expense but a battery dying is probably comparable to a timing belt breaking, those aren't cheap either and thats not even for luxury cars...
First of all, as your article shows, batteries rarely need replacement at all, even at very high mileage. And those are old vehicles, battery management and cell chemistry are much better now.
We had a 2010 Ford Transit van (diesel) and after 189000km, we sold it because the parts were becoming too hard to source (disclaimer: in New Zealand).
13 years old dead luxury cars are worthless, yes, especially when the tech is quickly evolving. That doesn't say anything about how long it takes for them to die or how reliable the tech is.
It depends on how many miles it has driven and how much other maintenance the car has had. It's a big expense but a battery dying is probably comparable to a timing belt breaking, those aren't cheap either and thats not even for luxury cars...