Comment by akomtu

The public thought got fixated on the VM style simulation. Consider another idea. The baseline reality is spacetime that can form any configuration with any number of space and time dimensions and everything in between. We live in the 3+1 layer, which doesn't exclude the existence of other 3+1 layers, just like one flat valley doesn't prevent the existence of other valleys. Those who know how to work with that spacetime can create arbitrary worlds, e.g. a toroidal 4+3 world. These world can be connected to each other in strange ways and transition between them may or may not be possible. Some local spacetime can be nested into bigger soacetimes with different configuration.