> 6 years is also beyond the service life of a(ny) machine.

I'm still on 2013 MBP which doesn't show any signs of deterioration (except battery life). It's got retina, fast SSD, ok-ish GPU (it can play Civ V just fine).

I'd gladly pay for a guarantee that the machine will not break for the next 10 years - I think it will still be a prefectly usable laptop in 10 years from now.