Re: Thank god I have an old car
No offence mate, but you really need to go on an engineering course if you think ANY of the things you've listed require a networked system in the first place, never mind one running IP over ethernet.
Yes , CAN bus already exists and its already overkill. As for "air conditioning, windows and mirrors to control, seat positioning, lighting" needing networking - sorry, were you trying to be funny or have you really drunk so much of the kool aid that you just can't see a simple way of doing these utterly simple tasks?
While at a fundamental level, it's true that nothing I listed requires a networked system in the first place, the same could be said of your phone, your computer and your printer. After all, you could just retype all of your contacts again in your phone, or use a hand held phone book and a pen. You could just write your reports rather than typing them on your computer and printing them out. However it's about progress... and progress in the device engineering front is steadily heading towards more and smarter control of devices. This allows much more efficient and accurate operation and much better diagnostics... and this requires a lot more sensors and a result is a lot more and better communication. In a car, a CAN connected ABS system can report traction problems to a central system, it can report back for each individual wheel if necessary and this can be fed back into all manner of systems, cross referenced with other sensors and devices (e.g. temperature sensors) and the operating parameters adjusted appropriately (ABS in the wet, dry and cold, potentially icy, conditions really does need different operation profiles). This is just one small example of ABS and systems where command and response is vital.
Why wouldn't lighting, air conditioning, mirrors, seat positioning and lighting need networking? If you've ever driven a vehicle with multiple driver profiles it's an enormous benefit having your own driving preferences compared to a partners and being able to switch between them quickly and safely.
I'm all for simple, however simple doesn't always equate to efficient, optimal or useful.