Maybe it's vestigial. But when I was your age that's what they said about "Junk DNA", which turned out not to be junk.

Tech debt in our own brains.

Sure, if you think of it as an egg, instead of as a galaxy of electrons and atoms so dense as to have structure big enough for us to give it the label "egg shaped object".

What if it's a "wireless" device?

me too! :-)

wrt to the egg - could be excreting chemicals modulating the intracellular medium