The sentiment certainly applies to negativity within relationships etc. You can't move on if you are nursing grudges.
But I don't think it is right to extrapolate too widely with it ! Lots of people are experiencing real loss over the change, and they need to be dealt with a bit more kindly, in my opinion. Equating the beloved old board with 'junk' is not really helpful. It may have been junk to the techies, but we need to remember that it was not junk to the people who loved it.