Doesn't that pretty much describe a cassette deck? :) LOL, yes, if the manufacturer components aren't intended to be upgradeable via software. A virtual speedometer or gas-gauge, for instance, should be simple enough to never need a patch.
Navigation and entertainment systems, on the other hand, can be a lot more complex. Not only does mapping software need to be upgraded, but I think there can be some temptation on the part of content publishers to endlessly tweak potential revenue channels (the continuously increasing number of apps on my AppleTV comes to mind).
What happens when one of these updates results in degraded performance? Again with an Apple comparison: I think about my iPhone 4S' performance after iOS7 rolled out. A vehicle's performance degrades as it gets more mileage, but it can be offset by care and maintenance. What happens when a manufacturer (or their subcontractor) pushes an update that turns your 2-year-old responsive console system into a sluggish mess? Would you have purchased the car if it had performed like that?