Will my car still run and drive if the Supercharger stops working? It is not covered under my "Powertrain" warranty because it is "attached to the motor", not part of the motor.

Yes, it'll run, but like ****. Bad mileage and poor power. Not to worry. The blower will probably outlast your engine, and if it doesn't, it'* usually only something in the nosedrive that fails, usually not the expensive part!