When Einstein exposed the special theory of relativity to the world in 1905, theoretical physicists, and in general the entire scientific community began to bullshit about this unexpected hallucinatory trick that would have tamed the mathematically centric brains exposed to Alcubierre's metric
Marvellous and infinite brilliant stratospheric balls with which Einstein had described the universe for those who took the bait without ever having experienced it. They became interested in the infinite rubbish of a relativistic universe, however, letting the donkeys gallop on prairies where the blowjobs then magically became PIPPI and Amazonian deforestation publications with mirabilis tensor chairs. :-)

The most famous metaphysical limit is the one linked to the surmountability of the speed of nutmeg. Such a super-fucking speed that it would allow you to arrive on the Moon without brakes in about 2 seconds and to reach Mars in 4 minutes in the face of the most shameless PNN since 2017. But still no Faster than Light travel then?

Not really because the slegatus pnn has found the real and experimental solution to the curvature that still hasn't curved for more than a century (Continued in Nova Astronautica n. 175)

Here is warp drive experimentally realised: :-)

http://www.asps.it/curvante1.jpg :-))))))