With a multiverse universe extreme density in-depth of verses regarding the folds receding away of the multi-dimensional multiverse is at once extreme shallowness apparent on the ocean's superficial 2-dimensional asymptotic surface of the universe. A traveler wouldn't swim the observed, observable, 2-d surface. the traveler would swim the unobserved, unobservable, volume-energy depths of multi-dimensional multiverse 'surfs' (currents) in/under/over the observable surface.
An old picture told of nature is that the beauty is observably surface deep and the ugly unobservable in-depth in/under the surface . . . or vice versa since beauty is in the eyes of the beholder.
SPACE! is unobservable (just as I've claimed many, many times)! Observable coordinate relative SPACETIMEs (plural) from the instant of photo-frame emissions are cartoon-page past histories (past histories from the instant of emissions) . . . no more, no less. No matter how fast light travels (the 1-d points thick, the 2-d photo-frames thick, travel) spontaneous REALTIME has already passed up the recorded time, the history.