B2 technology is decided by aEther concepts, often called debunked by modern science.
Prof. Brown & Bifost (2Bs) allow for aEther physics. Distant spaceflight as seen by Einstein allows Einstein to debunk aEther, but the tech exists, so Einsteinian concepts need updating or we need to find jobs with the military to pursue truth in science.
Historically, Einsteinianism is good for where it takes us. But i have friends on other planets.