Dave, remember back in the 70s when they first put emission controls on cars? The mileage tanked, people were ripping things out, V8s had less HP than 4 cylinders do now. Look at gas engines now. Nowadays good emissions can go hand in hand with supercar performance levels which was unthinkable back then. And on the flip side, think about just how noticeable the tailpipe fumes are around any older pre-emissions gasoline powered car.
I don't think the stricter emissions will hurt diesels. I really think it'll help them... it just might take 5 or 10 years but it's worth it for future generations.
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