If there was a long distance in the Void to be covered over units of centuries from the isolated point of Mycroft's galaxy to the other galaxies, then only a brief period was needed to cross between other galaxies beyond all put together.
The Great Khan answered Joshua's straightforward question without ambiguity. It knew Joshua's personality and therefore prepared the appropriate answer beforehand.
"The closer a galaxy is to the interior, energies are more concentrated and the civilizations more powerful. Of course, the environment would be more dangerous as well, just as there are less civilizations and more World Eaters."
