Manufacturer custom infotainment systems are like the system on smart TV's: Crappy UX, buggy, abandoned (no updates) after a few years. Just like we all use Roku, Apple TV, or Fire, CarPlay and AA are preferred to a built-in infotainment sysem - better UX, loosely coupled to the car, etc. Discrete manufacturers should not try to become domain experts in this area. Get the basics done, let the user BYOD.