[Phantasm]

Turbulence fits my arguments of "not knowing everything" as well. We know it exists, we can measure it, we can enjoy its effects recreationally (waterslides!), and we can kinda figure out how to counteract it, but we don't really know what it is and why it happens.

And I seem to recall in one of the books a mention of hyperspace turbulence. Just gathering raw data to figure out what causes and the physics behind that could take most of a Hutt's thousand year lifespan.