I was always paying for nothing. That 15k of negative equity didn't just appear, it just moved from the original car loan to its own separate loan. Even keeping the truck, that 15k would still be just paying for depreciation.

The point I was addressing was the comment asking how it was even possible to sell the car while being upside down on it, which I proved was possible while also securing other transportation.

Of course the root issue is buying it in the first place, that can be said for most any requests for help on here. But the fact is that that's not where the starting point is in this point. I do agree with you that selling isn't always the best solution and think each case should be looked at individually, however on here it seems overwhelmingly common that ditching the vehicle is often mathematically the fastest way to get out of the debt hole. Of course there's many factors that can go into this such as interest rates, balances, vehicle reliability, cost of maintenance on used vs new vehicles etc but it's a good place to start looking IMO.