The percentage of CM cars vs stock/back half cars is small. My local track has 100-150 cars on a regular points race day. Between Pro and Super Pro there might be a handful of CM chassis door cars and not 1 of them is a Mopar product. Even with tracks closing, typically the guys that can afford a full CM car aren't necessarily scrapping the bottom of the barrel living pay check to pay check so those guys are more likely to travel to a track if their local track closes. Like anything there are cars out there, but finding one can be difficult depending on your want list.