K & N filters

Let's see. Some have problems with k&n and some don't. Studies have found k&n pass more dirt particles. Seen any posts of OEM paper filters giving problems? Any studies showing OEM filter passing more dirt than k&n? Yeah but race cars use k&n! Hello! How long does a race car run between over hauls?
I say everyone put on what they want. But, I will stick to OEM pleated paper filters.