At Ford’s Rouge Electric Vehicle Center, in Dearborn, Mich., workers assemble the F-150 Lightning, an all-electric, full-size pickup truck. When veteran Wall Street Journal reporter Mike Colias began writing about the automotive industry in 2010, the internal-combustion engine still served as the beating heart of legacy carmakers. Since then, the hard pivot to electric vehicles has sidelined engine design and upended a century of internal order at these companies. Colias has observed the trans...