I've said it in another reply, but the automotive industry would've switched to this amazing new standard, except it would've added a couple of dollars to the cost and a few hundred grams to the weight of the car, so they just had to wait for this?

10BASE-T1S is more of alternative/replacement/upgrade to CAN and CAN FD, which use a single wire pair as bus, too. And automotive 100 MBit/s and 1 GBit/s Ethernet are also single-pair. (But they are point-to-point and therefore more expensive, as the article explains.)