Manufacturers continue to offer software updates for vehicles that have been out of production for some time, although the older the vehicle is, the less impact software updates are likely to have. Ultimately it is a matter of personal choice - a good independent will offer a quality of work that is equal to or possible better than a main dealer at a reduced cost, although for the time being at least you will have to do without the software updates, although they may be available to independent specialists in time. There is also the question of the vehicle's current service record - if it has a complete main dealer service history up to this point, you may wish to consider continuing this as it may make the vehicle more attractive to private buyers should you wish to sell it in the future.