The speed of light isn’t just a difficulty or minor inconvenience, it’s a physical fundamental of the universe, in the sense that the minimum amount of time something could travel from Earth to Alpha Centauri and back to Earth would be 8.5 years in Earth time, and there’s no getting around that. The objects/people aboard the ship/the ship itself could experience that entire trip in as little as 0.00001 seconds, but from Earth’s perspective, this ship would be traveling at 99.99% the speed of light there and back.