I did a lot of research before buying TDI. I would never get a hybrid thinking maintenance would be "less expensive". Replacing the battery on one of those is more than a couple of services on my TDI. They are also not nearly as fun to drive. I love the JSW TDI for being the perfect option to fit my needs: fuel economy, fun to drive, all of the space and cargo room I need, top safety features, and with all of the options I want.
Anyway, I knew going in that diesel vehicles are more expensive to maintain than their gas counterparts. Same problem, one on gas, one on diesel, and the diesel will cost half again more to repair, maybe even twice as much. That's one of the reasons I bought the extended warranty on mine. In seven years, we'll see how the car is doing and go from there. I tend to drive my cars for a really long time, though, and as long as occasional repairs are still less expensive when averaged out than a new monthly payment, I expect I'll drive this car for seven more after the warranty goes. What I buy then will depend on what is available. I except the options to look a little different fourteen years down the road.