VW specs brakes that are built by companies (e.g. ATE/Teves, Girling, Brembo) with those 70 years of experience. Tesla, famously, brought all sorts of complex

VW specs brakes that are built by companies (e.g. ATE/Teves, Girling, Brembo) with those 70 years of experience. Tesla, famously, brought all sorts of complex assemblies (e.g. seats) in house. So I'm curious with the situation is with the Model Three. I can sorta understand wanting to bring something bespoke like seats in house, but friction brakes are commodity hardware. If Tesla is trying to DIY friction brakes that seems like a colossal waste of time.