All that the JD Power chart shows me is that no matter what car you own, on average, you're going to have a problem and it's unknown whether the problem'll be major or minor.
Even if you own a Land Rover or Kia you're only going to have 1 or 2 more problems than the owner of a Lexus.
Seems like a waste of time and easier to just conclude that every car today is reliable and that judging cars on reliability is a waste of time.