My personal take on the question of space is that because of Lorentz contraction there is always an observer that sees the universe as a flat pancake. There is

My personal take on the question of space is that because of Lorentz contraction there is always an observer that sees the universe as a flat pancake. There is no true "distance" between any particles, and therefore no space. Every interaction between particles is because these particles actually collided for some specific hypothetical observer.