Bionics. In the show, The Expanse there’s a scene where a guy who had his arm cut off in a space accident is trying to get his company to not cheap out and to pay for a bionic arm replacement instead of regrowing him a new arm. The bionic arm being greatly more superior than a normal arm.
Lately, robotics and prostheses are becoming so advanced I can see this as happening to where people will eventually want artificial designer parts over their own.