Ha, I can remember when AC Delco manufactured spark plugs, try the lowest bidder today.
Been running my Cruze at a 25 mil gap (mil = 0.001 inches), but does take a bit of reforming as the ground electrode has to be perpendicular to the center electrode. This takes some skill. I still clean my plugs about every 15K miles, still burning carbon, use a ground walnut shell blaster. I can tell the difference.
Misfires are catastrophic to the catalytic converter plus reduce both performance and fuel economy, and cleaning the plugs on the Cruze is an absolute pleasure compared to many other vehicles.
Ha, while Tesla was zapping stuff, Kettering was doing the same thing with a much smaller spark, he's the guy that started Delco, but GM ate him up. Way ahead of Henry Ford in point gap ignition systems still using a magneto type vibrator system with extremely short life. But when the patents expired, Henry jumped to the Kettering System used in the Model A Ford.
Ha, a set of points generates a much hotter spark than any solid state ignition system all based on di/dt, not a transistor can switch off that fast. But are far more reliable at the cost of reducing the potential energy. A capacitive discharge ignition system would be far superior, but also have to deal with the bean counters. Just replace those points as cheap as possible.
Ha, the electronics behind this spark are far cheaper than any distributor that requires casting and machining, but you won't find this when you try to buy a replacement. Just bend over and smile.