Everyone wants to be on the winning side
I just upgraded (sort of) from a Lumia 1020 to a Microsoft 950. The new phone does everything the old one did, but maybe a bit faster. The camera resolution has gone down from 40 Mp to 20 - but that's hardly noticeable and the snaps are much snappier.
The sales people are only interested in selling iPhone or Samsung/Android. They have no knowledge of WP. They tend to diss the device as somehow "unfashionable" and "think about your image".
In public (here), people take their phones out of their pockets and place them on restaurant tables prior to a meal. Do this with a WP - and you get funny looks.
I don't think people care about apps, or OS'es or technical matters as much as they care about appearances and being cool. iOS and Android are the in-thing and successful and success breeds success. And if you are struggling with your iOS/Android - you can always ask the person on the next table what to do next.
I could tell you that WP 10 does everything I want - browsing, email, photos and especially the maps etc. etc. I can even use it as a phone - but none of that matters, because it has not managed to gain an "image". Too bad.
PS MICROSOFT - WHEN ARE YOU GOING TO ENABLE THE FM RADIO ON THE 950 ??????