On a recent episode of SciShow Tangents the sentence (heavily paraphrasing) "if you recorded a river, there might be patterns in the waves, but that doesn't make it musical, necessarily".

This is the metaphor I've been looking for when describing light. Most people are like, it's a particle AND a wave. But let me be more specific.

The double slit experiment is the river. What we see is evidence that a wave causes light to appear, in this case the quantum wave function. But light is also a literal wave, the sound wave in the audio file, something that by its nature is wave-like.

Of course, the sound file also isn't continuous, when you get to one of the tiny smallest bits of an instant, to be replayed back in less than a ten thousandth of a second, it is just a pressure value. That's what sound files are made up of, the smallest increment in their smallest moment of time, that's the quantum nature of modern music.

For light, the smallest increment is called a photon. It's that same wave phenomena we all love, electrical field change causing magnetic field change back and forth forever. But it's chunky. It sort of behaves in a pointlike manner but only for times when you keep trying to make smaller chunks.

Honestly, it seems like everything is chunky like light, and has the quantum wave (river) like light. But other things have a more pointlike essence. So maybe we should just say light isn't a particle and a wave, but that it's a wave two ways with extra chunk.