Funnier is that the implants might shift/fall and archaeologists will think people enhanced their shoulders and the back of their necks.

Then, there will be a subculture that does shoulder and neck enhancements.

Lol, I doubt we'll let go of big boobs anytime soon.

as to them always having existed, we have old skeletons with stuff like this done to them, Im not sure some implants found with a body would be much stranger.

wen mantis blades/cyberpunk stuff?

More like people in the future can order any boob size they want made from their own cells for the price of a happy meal. Nobody will know if they are body mods since the lab grown boobs are indistinguishable from body grown boobs since they are made from human tissue. It will become ubiquitous. People will just change boobs sizes on a whim, since the surgery will take less than a day. Going on an ultra run? get the flat chest package the day before. Your partner has a big boob fetish? get the huge mammaries package for their birthday. Even men might get a boob job for a day because they want to go in drag on halloween.

Body mods will go the way of the dinosaur. It'll all be digital avatars or things like the "surrogates" movie.