It's a car. It's not going to have an app store. You don't want an app store. You don't need an app store.
QNX is a well-understood RTOS--look up "hard real time".
There's a lot more important things in a car for an OS than being able to display a notification on Facebook; things like deploying airbags, coordinating brakes, and all these other things.
Furthermore the notion that you'd be sharing core processing between safety-critical car functionality with infotainment functionality is downright scary. These should always be (are they?) discrete systems.
I can cause my BMW's i-drive (CIC-HIGH NBT F20 2013) to completely crash if I perform a specific action. After fifteen seconds the system detects the freeze and reboots. The way the reboot occurs strongly suggests the reboot is performed by a hardware level supervisor. But the rest of the car continues to function.
It's a car. It's not going to have an app store. You don't want an app store. You don't need an app store.
QNX is a well-understood RTOS--look up "hard real time".
There's a lot more important things in a car for an OS than being able to display a notification on Facebook; things like deploying airbags, coordinating brakes, and all these other things.