Other than theoretically, the spatial dimensions can only ever be observed to be c * T where T is the total age of the universe. Thus, space is bounded as well. It all comes down to what it means to be bounded.

If something preceded the big bang, it cannot be observed (by our current reckoning). Similar to things farther than cT away... Unobservable; unknowable.

There's nothing inelegant about it. C is the conversion factor between space and time.