Optional extras have been around since the dawn of auto sales, but subscription services for anything from Wi-Fi hotspot to self-driving mode are relatively new.
Reviewer Larry Printz writes, "there are buyers who understand that a van will haul more, a pickup will tow more, and a sports car will be faster and handle better. But neither rationality nor need enters into the equation of a $150,000 SUV. It’s all about desire, something Cadillac seems to remember."