The reason I liked your answer is that it shows that the selection of Arduino vs Pi or Mercedes-Benz vs Hyundai is "application dependent." Ultimately they're

The reason I liked your answer is that it shows that the selection of Arduino vs Pi or Mercedes-Benz vs Hyundai is "application dependent." Ultimately they're both computing platforms used for control purposes. In some cases, the predictable I/O performance of the Arduino is an advantage over the Pi. In others it's not. In some cases, the built-in network access, CPU speed, UI capability of the Pi is an advantage, in others it's not. If Bezos actually does drive an Accord (with an entourage of security around him I imagine) then all that tells me is that for his "application," it's sufficient. It doesn't say anything about the merits of other cars.