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- Is there more about special relativity than claiming that the laws of physics are Lorentz invariant/covariant?

The Lorentz covariance of Maxwell equations was known before Einstein formulated special relativity. So what exactly special relativity brought new with respect to mere Lorentz covariance? Is special relativity just an interpretation of Lorentz invariance, in a sense in which Copenhagen interpretation interprets quantum mechanics? Or if there is something more about special relativity, then does it make measurable predictions that cannot be made by mere Lorentz covariance?

(To not attract the crackpots, I am giving my best to not mention the forbidden dirty "ae" word. )

(To not attract the crackpots, I am giving my best to not mention the forbidden dirty "ae" word. )