Is the diesel going to end up going the way of the dinosaur?

I retired in 2012 after 35 years with a major oil company in the pipeline business. My last job was increasing our output of diesel on our products line that pumped gasoline, jet fuel & diesel. I retired before it was completed. I have talked to some of my coworkers and yes they are pumping almost twice as much diesel as before up the east coast. The company must know something to spend millions on that project.