I think understanding holography is a good way to develop some intuition for this. The basic idea is that our notions of spacetime aren't fundamental, but inste

I think understanding holography is a good way to develop some intuition for this. The basic idea is that our notions of spacetime aren't fundamental, but instead emerge from other structures where locality may not be evident. The past 20 years of research into quantum gravity have been dominated by the development of toy models where our formulations of physics in 3+1 dimensions are interchangeable with theories in 2+1 dimensions, where a simple calculation in one theory may be translated into a complicated calculation in the other. If the way we experience local spacetime is an emergent phenomenon of low-energy approximations of structures that don't involve locality, then it becomes possible to imagine that at high energies, locality might no longer be present.