For centuries people argued whether light was particles or waves. Neither idea fit all the evidence.
I have the idea that all of the data that doesn't fit particles is about how light travels through space. For example the double-slit experiment.
And I have the idea that all of the data that doesn't fit waves is about how light interacts with matter. For example the photoelectric effect.
Am I wrong? Are there examples where the wave theory incorrectly predicts the pattern of radiation traveling through space?
Are there examples where particle theory incorrectly predicts how light interacts with matter?
Of course in modern physics it makes no difference. All we can measure is probability distributions, and quantum mechanics correctly predicts probability distributions. It makes no difference what interpretation we put on it when it correctly predicts the measurable results.
But do I have it right about the problems with the old theories?