> Most Windows phone owners I know (myself included) loved the design (hardware and software), the customisability, etc. but the lack of apps ultimately made us move to another ecosystem.

From my experience, that wasn't the case. I didn't own a Windows Phone but one of my friends did. According to him, what forced him to move was an overload of animations which became very irritating. I can recall a comment that suggested how Windows phone exploited animations to cover the fact that it was too slow.