Last trip to track - Nope! Coil went bad!?

Asking when/ if a coil will go bad is like asking about a flat tire. Stuff DOES fail sometimes for no reason. We are hampered in the last 30 years or so, by lower and lower quality due to overseas made poor QC and other reasons. When you want to start worrying is if you start failing MORE than one, in a short time. In my lifetime (I'm 75) I only remember about 2 bad coils of mine, and maybe a total of 3-5 of friends. "It may be" that 1 or more of those was not a bad coil, at all.