You guys might laugh, but there is one industry this is quite literally critical to as a concept-
Watch repair.
I went to school for a couple years in Oklahoma in a program that is now shuttered, for professional watch repair. The biggest problem facing horologists (watch and clockmakers) for a couple decades now has been the availability of spare parts.
Most of us (myself not included, as I can make near anything) do not have a machining background needed for the very high level skill of replicating watch parts to correct tolerances, so the entire industry has a razor to its throat and could die a slow death starting anytime as spare parts either are restricted or are not sold at all.
Watchmakers have parts accounts of course, for certain major brands that they can get certification with like Omega and Rolex that will provide parts but you have to jump through an enormous amount of certification hoops just to have parts available to be sold to you. They are gradually making the demands of watchmakers more and more ridiculous to the point where it is completely impossible to run a business doing it, where last I checked certain brands I shall not name require approximately $100,000 US worth of a very specific list of equipment that a watchmaker must have in their shop just to be considered properly equipped to have a parts account even if much of it are things a specific watchmaker would not use.
This right to repair bill might usurp the Swiss judgments within the industry and make the watch brands provide parts to the end watchmaker so they can actually fix your watch properly. There are so many watches that actually come in for service around the world that the service centers could never keep up even if they got every single one, so the industry refusing to sell parts to watchmakers, some brands not even providing parts no matter what, this might help the industry a bit.
For the record I do not work as a watchmaker currently, but as a machinist. Still, I do work on pieces occasionally.
