Matt, sorry to hear that you've reached the tipping point on M3W ownership but can completely understand. As Steve says, I very much still have mine and do intend to keep it for a very long time. I do think that part of the problem is the apparent inconsistency in the customer service so anyone who gets what they see as below par service will feel it as personal which makes the experience all the more painful.
Something that is worth bearing in mind is that while there is a seemingly low percentage of the owners at that meeting in January 2014 that still have their three wheelers, do remember that for almost all owners the car is very much a discretionary purchase, basically a toy, even for those of us who definitely did not buy it out of a "pocket money" fund and as such is likely to be changed after two or three years whether it is a Morgan, a Porsche, a Caterham etc. From what I can see, a fair number of the four wheeled Morgan owners active on this forum are now on their second or third Morgan since that meeting and then there are all the other toys that have been bought and sold in the meantime.