You are right that realizing that the wavefunction lives in configuration space is a big leap that is hard for people, but there is another leap which is more d

You are right that realizing that the wavefunction lives in configuration space is a big leap that is hard for people, but there is another leap which is more difficult IMO. It is that quantum probability amplitudes are not like classical probabilities: they have phases and can interfere with each other in ways that classical probabilities do not. This explains the weird interference patterns in the cool animation in the article. In my experience, understanding the idea of a distribution over configuration space isn't so hard. But getting an intuitive grasp of the behavior of probability amplitudes that can interfere with each other is hard.