….
Frankly if stuff is working I think that's about all we can hope for. Hardware manufacturers don't care much about software and are highly unlikely to offer updates unless they fix a serious fault.
This is the case, at least with my closest dealer. When I popped in with a few queries about the Jazz I asked them if they would update the head unit to the latest firmware and that is the answer they gave. Together with 'why would we spend a couple of hours with your car connected and updating firmware unless there was a fault?' Or words to that effect. I didn't ask them if they'd do it if I was willing to pay though … hmmmm. Anyone had this done?
As for the version of Android installed, that really makes absolutely no difference to the functionality offered by the head unit (lack of functionality in the form of bugs yes). It's just the underlying framework that has been tweaked to provide the functions offered by Honda. They could have used A N Other version of Linux, embedded windows (even XP!) or maybe gone to Samsung and used Tizen. But what the user sees/saw would be exactly the same.
I work in a supermarket and our tills have recently been upgraded from some version of embedded Windows XP to Windows 7 - no difference whatsoever from a user viewpoint, though they're just as slow as they were, but that's a different story!