Let’s talk about spark.
In modern, computer-controlled cars, ignition is reliable to the point where you rarely consider that it might fail. You have coil-on plugs, also called stick coils, snapped onto the tops of spark plugs, with not even a plug wire between them. The stick coils and plugs are typically hidden inside the engine under a plastic cover that looks like the top of a Shop-Vac. There’s no distributor, because the functions of advancing the spark with increasing engine rpm and distributing it to each cylinder are performed electronically, with everything controlled by the car’s electronic control unit, or ECU. Something like a bad crankshaft position sensor might prevent the ignition system from being triggered, but it’s rare for the entire ignition system to go bad.
This is a companion discussion topic for the original entry at https://www.hagerty.com/articles-videos/articles/2018/06/25/the-difference-between-plugs-for-classic-and-modern-cars