So many things caused the demise as a lot of you wrote. Here's a few more. 1. When NASCAR said we'll let this grow as far as possible then we will do something. No controlled growth. 2. NASCAR said some time ago they only want like 4 owners to own all the cars. What the heck are they thinking? No little guys? 3. No one mentioned the owners! Rising costs! Here's an example, albeit dirt: A driver said to Jerry Fried "You have to raise your purse" Jerry said "why?" Driver says "I just bought this new enclosed trailer". Jerry says " I didn't tell you to go buy an enclosed trailer." Larger purse higher costs to attend races. 4. Cup drivers running lower classes. Little guys cannot make t who actually might be better driver. 5. Anything aero..... I'm stopping here.