Has long irritated me that car audio systems have a discernible boot time, having come from the days of instant-on radios. There really is no excuse, between optimizing the boot process and starting it the moment the car starts (not like there's that much of a draw, speakers off, from the alternator).
Even worse is when the backup camera is linked to the entertainment system. You start the car, put it into reverse and then have to wait for the system to come on. It sucks especially in a parking lot where you have to pay extra attention to cars creeping up when you are trying to get out.
The less shitty car makes use this to start the infotainment system early, BMW and Mercedes comes to mind.
But the overall state of infotainment systems is laughably bad, there's a few that are merely ok, most are bad, and some are rage-inducing. (Hello Cadillac!)
