So this not that thrilling but my BMW r1200gs has this bus. I dropped the bike recently and killed one of the turn signals. Canbus lit up saying you have a light out. I fixed the turn signal and it still lit up. I thought I needed to reset it or something.

Turns out I killed the headlight in the drop as well. Without the canbus it would have been months before I would have caught that. I thought it was a BMW over-the-top thing but it actually helped me, it was the daylight running headlight that went out. Good to have that one.

Like I said, not thrilling, not programming, but an upvote for the Canbus.