[obfuscated spaghetti code]
Hey now, don’t remind of a bad experience just a few years ago....(worst I have ever seen)
The flip side is modern CAN bus is robust enough to prefer for all sorts of extreme embedded computing, e.g. robotics, amateur rocketry, R/C aircraft (e.g. drones), and space probes (see ESA Smart-1 for the latter).
But there are still plenty of perverse implementations.