That ‘everything’s moving’ argument is a convenient shutdown, not a dead end. We already track motion precisely, GPS corrects for relativity every second. That means relative positioning isn’t unsolved; it’s restricted.

You wouldn’t target a spot in space. You’d target a worldline, like Earth’s continuous path through spacetime. Same path, different point.

Saying you’d end up in empty space assumes a cartoon machine that only changes the date. A real device moves you along spacetime itself.

So when people say time travel is impossible because there’s no reference frame, what they really mean is: you don’t have access to the frame that works. Not impossible. Classified.