This is an increasingly common way of manufacturing small, high precision metal parts. Several years ago I designed specialized small 316 screws for an instrumentation product. It was much cheaper to sent the drawings to Germany where a company I had spoken to, made them in their million dollar 3D metal printer. So print and sinter. That’s the main way they’re made these days. But bother metal printing processes are coming out which could prove to be faster and cheaper. Apple is big enough to help that along with money, as they often do.
If Apple increase the amount of components that are 3D printable, this should improve the repairability of the product. Inventory costs should come down too.
The future looks interesting.