I feel that "Space-time" mathematics works, for units above the atomic scale, for a rather simple reason, mathematical space is filled with "dots," units considered to have no "size" but yet which fill the space, thats is mathematical space does not admit of a void. Similarly, in practical useage, "time" is measured in discrete units tied to a reproducible natural cycle of some sort, so the term, "time," as applied to reality, rather than to mathematical abstraction, implies cyclic motion. Therefore, "Space-time" as a pair of words, can be taken to imply a possible application to a "Reality" made up of some sort of "dots" which move in cycles, or rotate or both.