That is the thing though. It is not "6 year old technology". In reality you are getting better features. IE Text Messaging and more contacts. Our testing here and in many customers vehicles who provided feedback found no difference in actual Bluetooth performance.
As with many other parts from BMW, say for instance Fog Lights. Company makes early model Fogs and then BMW switches to say Hella and now they are "Gen 2". In reality it is the same fog light, made to the same specs. If you have a 1st generation module don't worry about it