Ars' Android Auto review

Ars Technica has a review of Android Auto.While we love the interface, we just wish there was more of it. Android Auto only covers a subset of the things you would want to do on an infotainment system. The result is an interface that - depending on what you want to do - will have you bouncing back and forth between two different interfaces. It's almost like installing Windows 8 in your car - you've got one modern, incomplete interface paired with a more comprehensive legacy interface. Android Auto can't control the AM/FM radio, CD player, or satellite radio. You also can't adjust the screen brightness, pair a device with the car, or mess with any other settings. Every time you start the car, it launches the ugly stock infotainment system, and you've got to plug your phone in and hit the Android Auto icon. Expect to switch from the beautiful-but-limited Android Auto interface to the slow, chuggy, tasteless OEM interface a lot.Can anyone with knowledge on the matter explain to me why, exactly, car manufacturers have such outdated, crappy in-car software? And why, even when we have something like Android Auto that could power everything, do they insist on only letting it do a subset, dumping you back to their own crap software for everything else? Why is the car itself running Gingerbread (yes, Gingerbread!)?Why are they so incompetent?