It certainly feels wrong for spacetime to be quantized, because it’s fundamentally no linear and geometric in a way that other things aren’t, and quantized theo

It certainly feels wrong for spacetime to be quantized, because it’s fundamentally no linear and geometric in a way that other things aren’t, and quantized theories like string theory tend not to be inherently background independent, which seems really wrong. At the same time, we know that a basic semiclassical + Everettian model of the world does not correctly model reality - if we run a quantum-linked cavendish experiment, we don’t observe the gravitational effects of superposition. I.e. each branch of a quantum superposition behaves as if it is in its own spacetime. We can even run a Bell experiment linked to gravitational detectors and observe that the results are consistent with gravity being quantized.