Spark plugs. Why is it so hard?

@Bewy is right. Iridium and platinum reduce the voltage required to ionize the gap and jump a spark.

Bigger gaps burn better and ignite more reliably given a wide range of AFR.

Many folks run a high output coil, capacitive discharge, or other ignition for "better spark" and yet iridium and platinum play a role in doing the same but get **** on as "unnecessary".

Platinum actually have the best voltage reduction compared to a standard plug if I recall correctly. I put a set in my motor recently for that very reason. Less voltage to create the spark equals less dwell needed and longer spark durations in the chamber. It didn't make any seat of the pants difference but as I've spot checked plugs they've showed a cleaner burn. Maybe it's the plugs, maybe not. The science is still sound..