I had been going through coil-packs pretty regularly. I even made a thread similar to this one. Recently I started my car and it was only running on three cylinders which led me to find this.
It's possible this was causing my coil pack issues, or it could just be coincidence, but I'm gong to swap the rest of the plugs and see what they look like.
Extra info: The first(original) coilpack lasted a lot of track time, then they slowly started failing faster and faster, I chalked it up to buying used coilpacks but I have to wonder if it was driven by the plug. However, the car only had 20k when I got it so the original pack was pretty fresh.
Extra info: My header is modified and retains all heat shielding along with the stock overpipe, I almost always keep the hood open after a session and added a hood vent a couple years ago