That's just not true of modern vehicles and you know it. You can't get a dash display replacement for a 2021 Audi or whatever from anyone but Audi, etc... You can't get an engine control computer for your new Toyota from anyone but Toyota.
It's absolutely true that engine parts can be made in a machine shop by a suitably talented artisan, so there remains a third party parts market for those things where there isn't for e.g. 20nm digital logic fabrication, NMC battery cells, etc...
But that's because one of those things is century old technology and the other isn't. It's not a business model thing, at all.
It's absolutely true that engine parts can be made in a machine shop by a suitably talented artisan, so there remains a third party parts market for those things where there isn't for e.g. 20nm digital logic fabrication, NMC battery cells, etc...
But that's because one of those things is century old technology and the other isn't. It's not a business model thing, at all.