If Toyota and Mazda make electric cars together, where’s Subaru?

2018 Subaru Outback 2.5i Limited Tail LightAt the end of September, Toyota and Mazda announced they would form a joint venture with parts maker Denso to design, test, and build components for a shared electric-car platform. Earlier interviews with Mazda indicate that the small Japanese maker will create its first all-electric model for volume production by putting a unique body on top of...