Well the core insight is in there, but it's not highlighted enough: "The model is very sensitive to the rate of depreciation." Every TCO model for cars is ver

Well the core insight is in there, but it's not highlighted enough: "The model is very sensitive to the rate of depreciation." Every TCO model for cars is very sensitive to rate of depreciation, and this rate is very hard to predict. You can rely on historical data only so much - how much in demand will petrol cars be 8 years from now? Diesel? What kind of tax incentives will we get over the next few years? And a single percent difference in depreciation rate can put one car ahead of another. Within the last 10% or so, it's a crap shoot. And 10% basically puts all cars in the same class within a single bucket. So yeah.