Well, hopefully, Spatial will have parts available even if they are a different brand for the speakers we have purchased. What happens if someone blows a tweeter in the M series present and past models, what is Spatial going to do to help their customers? Woofers also. The good thing is with the design you should be able to take out one tweeter and install say the new one they use that is silk dome, even if that meant you have to buy a new crossover box to replace the current one on your speakers. The power of large established companies do give you peace of mind. Dynaudio, B&W etc. Clayton a good guy so I am sure he has a plan in place to offer upgrades if needed.