>>Your average five year old car with 100K may not pass without major engine work, but would be young enough to justify the big spend.<<
Mmmmm, I believe we've turned into a disposable society. it's easier to throw it away and buy a new one than repair it. Or let someone else buy it cheap and repair it very cheaply, ie bodge!Whilst you swan around in a new model..... (Plus most of the decent engine builders will probably have gone under by then).
It'd be nice if it did turn out that we recycle more but look at Japan, firstly they sent us their engines now their cars, where are ours gonna go?