Guess who has Insomnia but also has an important meeting at 10 in the morning tomorrow? :D
Aaaaanyway Venezeulan nanobot Stem Cells, from a biologist's perspective, don't really provide anything quantifiable from how Xenon talks about them (but hey, I don't fault him, nanotechnology is a new and bizarre field of science, like how Nuclear physics was back in Stan Lee's day). Like the "double the capacity of a normal nanobot" or "half the size of a standard nanobot" thing is an unquantifiable statement because there kinda sorta isn't such a thing as a standard nanobot. If he means real world nanites then that's not super impressive considering how current nanotechnology is in its infancy.
We're told what they can do, which is function like stem cells, which *is* a known factor, but we're not really told to what degree. Right now that could mean anything from "I'll be out of the hospital bed in a week or two after Godzilla stepped on me" to "wolverine ain't got nothing on me." Best just to ask him what the limits are.