> Laws of physics place hard limit on your speed, they don't do that for lifespan of your engine. That cannot be true. Nothing escapes the laws of physics. It

> Laws of physics place hard limit on your speed, they don't do that for lifespan of your engine. That cannot be true. Nothing escapes the laws of physics. It obviously depends on the engine, but for example current electronics have a lifespan of only a few decades. Even the half-life of DNA might be a problem, depending on the hibernation method.