Charlie Spencer
Road courses and short tracks.
I don't buy into the 'upset fan' theory. Larson planned to run the Charlotte race, not intentionally skip it or sit it out. Larson's fans knew over a year in advance he had a potential conflict, well before tickets went on sale. Missing the C600 due to trying the double has happened once in ... eight? attempts.Now imagine of Joel Embid was healthy and skipped out on the 76ers to go play a big game in Europe. People would be outraged.
Also, I'd prefer this rule have more consequences for suspensions, preferably making the driver ineligible for the playoffs. Those have happened a lot more often in the last few years than attempts at the double, much less unsuccessful attempts.