Actually, in the current Milky Way, there are still plenty of scientists who are worried about this matter.
Long-distance travel in this galaxy, at least on the advanced technological level, has already solved the problem. The further the distance, the faster the gradually accelerating flight mode, although there is a limit to this speed, at least it's not a big issue.
But for distances that are neither too near nor too far, like a few light years, it becomes a bit awkward. A few light years distance generally doesn't take much more time than ten light years, and even fuel consumption is almost the same.
This Gray Star Region is only a few light years in size, and if there are any strong ones within a few light years, it becomes a big problem. Their arrival would require some time, meaning it would grant Jia Yan precious time for his transformation.
