The clue is in the accusation of 'fanboy' which I believe is a projection. There must be a contingent of simmers out there who are partial to FSX, P3D or X-Plane that have invested heavily into those sims and now realise that the new hotness is quite frankly - amazing. Bugs and temporary shortfalls aside, there is no dispute amongst objective, experienced simmers that MFS has a LOT going for it out of the box.
It has also won a lot of new fans and gotten people talking about MFS that have never really heard of it. Personally, I've had a number of people approach me about it after posting a few videos on Facebook who are blown away by the geographic detail in places familiar to people who live there.
It's all very positive and it bodes well for the community and the third-party business