Better, Cheaper Prosthetics

This company is making 3D printed bionic arms for about 1/10 the conventional cost.  They are customized to each user, including skin tone.  I wonder if that will bring down the rejection rate (often 80% or more) for upper-limb prosthetics.  Most people just don't find the advantages worth the disadvantages.  Another problem is that few people can afford prosthetics for growing children, but kids who don't grow up using a prosthesis will naturally find other ways to accomplish tasks and then not want one later.