It means it might be too boring for people and might get axed. Though no one really knows.
Then there's no need to worry for now, the manga already sold
200k copies with only 4 volumes (Well, in circulation), which is actually a quite good number for such a niche concept (Also, this number was 80k back in April, so the popularity is actually going up, AND Vol 4 just came out, so it's more like 200k with 3 vols), and it's been recommended by some of the
biggest names of the Isekai genre (and some others outside of it)
So the future is actually quite bright for this manga.
(Of course, a manga can be axed for multiple reasons, for example, Act-Age, but in this case, not doing well commercially wouldn't be it, unless the mangakas fucks it up real bad in the nearby future.)