I'm going over to Android after my long stint with WP.
Managed to bag a HuaWei P8 for £150, decent camera, budget price with flagship quality.
Reasons For Leaving:
Since 6.5, everytime an upgrade occurs, it's two step forwards, one step back.
Mango revamped Windows Phone, Great. Lose a lot of previous MS stuff. No issue, building up again. Then 7.5->8.0/8.1, they build almost everything from ground up again. Windows 10 Mobile is now doing the same.
I took a break between Samsung Omnia to Lumia 800 and been with them since, everytime I think wow, this is better now, I lose the perk on the next x.x upgrade. Zune Music / Xbox Music, now with insistence of no upgraded BT AVRCP since the step forward in WP8.1 in W10m (despite beta/preview), yet this is the platform released on the Flagship 950 / 950XL!?
I don't use a lot of apps, but Outlook / Skype is one of my most used, being MS own isn't the same as Android / iOS.
As much as I enjoy Randy's 6-Apps, official apps such as Instagram is in Beta forever, I can't even gram non-square ratio photos unless I use 6tag.
Nokia Drive works fine on Android, along with plenty of other free apps alternatives.
Will still keep my existing 640XL and Spare 920 for whenever Windows 10 Mobile works to what I need. The UI and Live Tiles will be missed, Cortana as well. For now, I bagged a better deal and I'm ready to take another holiday from MS phone.