Well, they showed me the car today. I obviously can't see if the chain is stretched, but I saw the scoring on valve cover and camshafts.
I too don't believe the missed maintenance has anything to do with the failure, unfortunately it has everything to do with the fact VW is not offering compensation.
Even more, oil & filter were preventively changed when I purchased the car, but this was not logged as a maintenance (and too late anyway, dealer says the 1 year maintenance needs to be done regardless of mileage)
Really, I feel the dealer is doing his best, he is the one who got the 20% compensation for me. But 80% of 14k euro is still too much.
Maybe some more info about "more to the story": the car did give me a low oil pressure warning just before I shut it off. I don't see how that is related to a stretched timing chain. At that moment the motor was already making screetching metal on metal sounds. Dealer tech says he has no idea about the root cause.