Well the only example we had was the baby duramax on the Colorado which has ended production. IMO, the only good Colorado ever made because it also came with the bullet proof GM 6 speed. Its hard to say if it had poor sales because it was always very limited production in the states. When I was looking for one back in 2019 none of my dealers had one and didn't know when and if they would get it. If I had really wanted to get it I would have had to ship it from another state. GM also did a pretty good job on the DEF on it. The HP was a bit low but it had decent torque numbers. Drivers still claim up to 30 mpgs. For the most part, it was a good truck and was the closest thing one could get to a real global product. But GM sales dwindled overseas and they left many markets which was probably a huge reason why they shut the plant in Thailand for the 2.8 duramax. Again, I never saw GM remotely fill the supply chain for the 2.8. They never really sat on the lots indicating low demand because of the rarity. So I'm not sure your argument holds up for low demand. At least for the Colorado.In the states there just isn't enough demand for diesels to make it worthwhile for Ford to offer them. Case in point being the 3.0 V6 diesel that was offered in the F-150 but has now been dropped because of poor sales. That engine is now being offered in the 2022 ROTW Ranger. A hybrid pickup (e.g. the Ford F-150 Powerboost) is more attactive as it gets comparable MPG, comparable (or better) torque, gasoline is cheaper than diesel in the states by a significant margin and you don't have to mess with the cost/hassel of DEF. And even better, the Pro Power Onboard generator that you can get with the F-150 Powerboost (and hopefully the PHEV Ranger) is an absolute killer option! I'll be surprised and very disappointed if that fantastic option is not offered on the Ranger PHEV. The Pro Power Onboard generator is the bait that will make me trade for a PHEV Ranger.