That fits with what I understood of their effect on Earth. The lusii she tried to import didn't do well with human children. All her best efforts at genetic tinkering couldn't set up the symbiosis she was aiming for.

[Hm, he thinks he will put these metals together in the pile with the quartz. Then he can group them together based on their use to maximize sylladex space.]

It'll be interesting to see how you guys choose to reforge your culture with the wigglers Kanaya is presumably going to be coaxing out of the Matriorb. [However that happens? He only knows so much.]