I think humans already have a weird ability to sort of assimilate tools and machines into our sense of self, such that the tools become an extension of our selves. The term tool embodiment came up when I tried looking up the phenomena and it seems to apply here. People with lost limbs can already feel fake limbs as a part of themselves, I think adding an extra thumb or whatever is child’s play.

I think the real question is, when are we going to start adding tentacles to ourselves?