Posting here because the results come from pushing the limits.
Starting with the current state of the beast:
Now for the snack. #1 spark plug. All others looked ok, but it'* very obvious I need to go to colder plugs from what I saw on #2-#6.
This is what happens when your octane doesn't match your boost levels. Or when you hammer it with non-premium fuel. Or when you push the limits of boost with too 'warm' of plugs.
Regardless, these plugs went in the car during WCBF, the day before the first track day, and have less than 1000 miles total on them.