Erwin Schrödinger proposed the quantum mechanical model of the atom, which treats electrons as matter waves.
Quantum mechanics is a model, but it was not created on the assumption that the universe is a computer simulation.
What is the best way to model reality if we assume that it is a computer simulation?
In that case, we probably can not treats electrons as matter waves anymore.
How to interpret the Double-slit experiment if we assume that the world is a computer game?