Skezza, would you like to tell us why it isn't quite as straightforward as that?
Because car manufacturers have stopped licensing major brand Nav software to provide RT routing for their vehicles. Instead, they now opt to develop their own in-house sat nav package via their own software development team, it's a good cost cutting measure and they've been doing it for about 10-15 years.
The problem is, when you give a development team a task of building a software package in 18 months to do a similar job to that of a more 'mature' competitor, you have no chance of achieving that goal. Do you really expect a software development team of, uhmmm, anywhere between 20-50 (at the very most) engineers to develop a Sat Nav package that can compete with Garmin, TomTom, iGo etc? No, and Porsche, VW, Land Rover, Merc, are all developing their own in-house packages that are literally dreadful compared to the dedicated software. Those pacages I've mentioned have been developed over a number of years. They have 100's of developers working everyday. They'll use heuristic algorithms that have literally been tweaked and tweaked and tweaked, to the point they are incredibly accurate. They will not only come up with the best route distance, speed wise, but they'll also factor in features such as country lanes, motorways, etc, all things not available on the in-house software.
At the end of the day, it doesn't matter in the grand scheme of things, Andre Wisdom will buy a new Porsche, and anyone who can afford one, probably wouldn't be too bothered if this happened to them, but if it was me buying my own Porsche, I would ask for one with no in-car system (apart from the base model perhaps) and then I'd replace it with an unlocked unit running Windows CE 6, at which point I could access all of the major packages I've talked about: iGo being my favourite.
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