[gnramires]

Interesting. I ask because I have a suspicion that Quantum theories seem more fundamental than General relativity, because treating geometry within a quantum framework seems very hard and "non-natural", or implausible (e.g. when considering superposition of spacetimes!). While if somehow gravity is a quantum effect (within a simpler space-time framework), that seems much more plausible... but Kaluza-Klein captured my interest in the other direction. Although I'm still thinking the quantum framework is appears to be the correct one, even though the assumptions of GR are very strong (so something like the equivalence principle or some other notable principle needs to break).