Cauis assumed that the things they brought in were products from their world, which was also very interesting in its own way.
He, as the princes' playmate, also had access to some parts of the Holt Royal Library. He was a bibliophile and to be honest he was better-read than most of the royals.
He had read records about how the new civilizations affected them and, frankly, it wasn't much except for maybe adding millions of people and diversifying the humanoid bloodline.
Even if they had technologies from their previous world, none of those seemed to have made an impact to Xeno, or even just the human realm, in any significant way at all.
For instance, the previous Migrators, the Novans, seemed to have died out or become enslaved in less than a year of their arrival. Most people did not even remember they arrived at all.
However, many nobles with large resources, including Holt nobles, wanted to explore more and see if the new set of people could be used elsewhere.