The answer likely has to do with the automaker’s internal culture. For years, Hyundai has opted for a “go at it alone” approach; it prefers to do as much as possible in-house. For example, it builds its own steel and has created its own domestic supply chain. Simply put, it’s reluctant to work with outsiders. It also does not want to be treated by Apple as little more than a supplier or manufacturer.
As of this writing, Apple has not publicly commented though we expect it will shortly. This doesn’t necessarily mean the end of the Apple car, but the tech giant will now have to find an alternative manufacturing partner.