[nine_k]

The system of epicycles was made of pretty simple, easy things: circles. It's when they were combined things went complicated.

Same with Schrödinger equation: it's very simple for one particle in an empty Universe, but things go more complicated when more particles are considered.

There is no guarantee that a different approach can replace QM and describe things in a simpler way. But I suspect that attempts to look for such approaches are not useless.