You really don't understand, do you? It is not about truth telling or who's truth to believe. It is about true finding and helping people understand.
Maybe I can be an example? I'm having trouble finding the same information, namely long duration cost of ownership. I appreciate Bob's posts, have read many in the forum and like his engineering approach. His post here was interesting, but my reaction to it was that I don't tend to drive 25k/yr, so his M3 data won't apply to me; his info is just one data point; for me, his data are still short term. Still, happy to have seen his post.
To give context, I've driven every car I've bought into the junk yard. Typical length of ownership for me is ballpark 10 years and, except for a Saturn, mileages will be over 100k. I think the Colt was around 120k/11 yr; Saturn 80k/14 yr; 2001 Passat 230k/12 yr; 2010 Passat (piece of junk wish I never bought it never will buy a VW again) 100k/11 yr. The 2014 VW Sportwagen is at 7 yr/90k and I want another 4-5 yr out of it. When I've looked for total cost of ownership for EVs, I've had trouble that either the report is done as a comparison and isn't clear about assumptions or even what the reference case is or is only 5 yr.
For me, I think decarbonization is important enough that I'm willing to pay a premium since I've been fortunate, but I don't want to do it blindly. I've never spent more than $24k for a car (new). Adding $16k to get into a M3 Std+ is too big a premium (just sticker price), so I need to correct that number to a TCO and make a fair comparison, but for me that means drive it into the ground.
My assumptions for anything that I buy new is 10yr and 100k. If I won't hit that without battery service for an M3, I need to add in that cost. For an M3 and my driving, I'll likely hit end of drivetrain warranty at 8yr with only 70k on the car. (In this case, it will be my wife's car, which is lower mileage...could even be 60k). I'd like to know that I can assume 2 more years for those batteries, but really would like to see 4 more. I sometimes wonder if I should pony up the extra $10k for the long range now so that, at 12 years with degradation, I will still have good range, but then recoil because that's almost half of what I've ever paid for a whole, new car. Still, if adding 25% to the purchase price gets me 25% more service life because I avoid being forced to sell because of range degradation, it's worth the 10k now. I wish I had data to help make this choice, but I don't see the long term data. My instinct, though, is to skip the $10k range upgrade and count on 8yr of prices falling instead as the better hedge.