Our new microwave replaced the exact same model that was purchases 2 years ago, that's right, 2 years ago.  We assuming that was a fluke.  So far I'm happy with this one except for the one change you made. Instead of having two lights, one on either side, there is one light in the back.  It's a lower wattage and it hardly sheds any light on the stove.  The only reason I can come up with is it's a cost saving measure for GE