It seems almost every form of faster than light travel in sci-fi is technically not faster than light, but rather a loophole - for example, a warp bubble, hyperspace, subspace, wormhole, jump drive, folding space etc.
What is the most modern depiction of craft or phenomena travelling superluminally, at or above c, without a 'loophole'?
Especially interested if there is a good explanation, and not simply ignoring, pre-dating or discounting theory (for example, a device that negates the mass of the object, thereby allowing it to reach c without increasing to infinite mass).