This may well be the last map update many owners (especially in the UK) are entitled to, without buying a new map update subscription. The reason being that map updates were only included for a period of 3 years, from the date the car first used navigation. (don't try buying a new Nav SD card - this does *not* get you a new free subscription.
You can now buy a further subscription for future map updates - the pricing is very odd, but essentially it makes sense to buy the 3 year option. More details of this will follow shortly.