I don't think it's gone, but I think it's going to change. I looked up video of Clean Sweep, tuned by DT. Nick said that the performance diesel was changing, from full deletes to emissions compliant. Clean Sweep was a good example, sitting at around 620hp on the dyno with all emissions intact and zero smoke.
While the press definitely sucks and the scrutiny to diesels, I'm glad that DT has actually proven it's possible to increase our power levels, and not need to worry about who's near the tailpipe when we get on the skinny. I hope that others like Kory and Rob are able to do the same. If I can avoid removing my emissions, stay smoke free, AND enjoy all the benefits of making more power to my truck, then what are we really loosing?