There is also the possibility that some people find desirable features in several platforms and do not wish to be tied down to just one:
I love my Q10. As I said before I find it way more reliable than my now defunct Note 3, I love the size (hey, I get to look respectable in my reading glasses, lol) and I love the keyboard.
That said, because I will not pollute my Q10 by side loading Android apps, I am missing a few on my phone.
But I have my Galaxy Note Pro tablet.
No, it's not perfect, it lags a lot and the keyboard keeps hiccuping on me, but I love the display, the 4 way split screen is to die for and it does everything I need for work and play.
And I get the apps.
Then off course there is my iPod Touch.
It's a 5th generation, I bought it last year because I like a playlist when I teach yoga and most studios in my area are sound equipped for Apple products.
Amazingly enough, it has survived IOS7 so it works fine and I can hook it up to my Q10 or Note Pro hotspots if I need to.
This means I get the best of 3 platform and don't have to care too much about what I'm not too crazy about.
Because of the Blackberry Hub, I get all my emails from all my accounts in one shots, even with my iCloud address, without having all my eggs in one basket.
Will I ever go back to an Android phone? NOT IN A MILLION YEARS. I find it too unstable and again, being forced to update a device that I bought out right and own is unacceptable to my Libertarian tendencies, lol.
Will I ever go back to an iPhone? Well, at least they don't force you to upgrade though if you do, unlike BB, you cannot go back. Apple would have to pull a small miracle for me to use their phones again, but I find this more possible than with Android.
I just like my Q10.
I remember when I had to give up my old BB I was so bummed, and now with the BB10 OS I'm really having fun.
But I do think there are pluses and minuses in all platforms.
Apple is too limited and strict but whatever they have that works is reliable. (except for IOS7, lol)
Android is the equivalent of being a kid in a candy store... complete with the sugar rushing freak out on the updates.
BB is solid all around but it lacks the apps.
I see no reason not to use all of them and switch at will when I need features that are stronger in either of them.