So far as Obi-Wan is concerned, Anakin has always had a slightly peculiar interest in, and attachment to, all things mechanical. Since he's hardly the first, or only Jedi to have that sort of talent, it's just one more of Anakin's little quirks. And lbr he loves Anakin and his little quirks.
Excellent. How about a biological von Neumann probe?
And lbr he loves Anakin and his little quirks."That's excellent news!"