Interesting idea,and I'd love to see this work, but this particular chart isn't helpful in practice due to huge differences in vehicle depreciation, repair and

Interesting idea,and I'd love to see this work, but this particular chart isn't helpful in practice due to huge differences in vehicle depreciation, repair and insurance costs (e.g. S Class vs Land Cruiser) Another thing that this chart neglects and which I feel is a very important consideration, is safety. The difference in safety of a current vehicle with one from even just 10 years ago is striking (never mind 15 years).