As with anything ; setup and proper operation is paramount. I do remember the old Quadra engines the guys used way back when with true magneto/points ignition and no high-tension wire shield got by with Airtronics but those with most other radio systems on 72mhz had issues.
Having said that; a lot of issues were created with dirty spark plugs , bad point condensers , dirty, misadjusted points and so forth but then that could be called poor installation and operation. Now those issues should be pretty much cleaned up with the newer shielded ignition systems out there.