>>11878996lmao... Nowhere in quantum mechanics do we assume the space to be discretized in any sense.
The difference is subtler, deep insights follow from the lorentz invariance of Maxwell equations, especially the constant maximum speed of information. This concerns the special relativity part, which is in no way in disagreement with quantum theories. General relativity then introduces the concept of principle of equivalence, which allowed Einstein to construct his fileld equations that simply state that space curvature is equatl to the stress-energy of the substance that produces it, i.e. G = E where G is somehow related to the curvature, you can think of G as for example a second derivative of a function which describes curvature. Quantum theory is in many ways much weirder in the sense that you generalize the phase-space relation of generalized coordinates in poisson brackets {x,p} = 1 to the unintuitive operator generalization [x,p] = ih{x,p} which leads to things like the Heisenberg relations etc.
