K&N Air Filter?

I used to use them on all my vehicles; bikes and cars/trucks. That was before the advent of computerized intake/combustion control by the vehicle itself. K&Ns coupled with exhaust modifications and carburetor jet changes (remember those?) could yield demonstrable results. Enter the computer control...doesn't matter how much air is there (restrictions), the computer will change the ignition/fuel systems to use what it needs which is easily provided by the stock filter system. The stock filter system doesn't require bucks to K&N for their filters and certainly doesn't require the maintenance required for them. Stopped using them for those reasons. I also am in the camp that without the required maintenance, performed religiously, they do pass more "dirt" than the paper filters they are designed to replace.