Here's one everyday user, albeit a Windows Insider that now has a serious Linux machine up and running.
I'm just waiting to something to appear in W10 to tip the balance, and these helpful...
If you enable the watermark, "Insider preview" is missing although it still quotes "rs2_release" rather than "rs2_release.inmarket"
I reckon they'll go to Build 14400.
So there is now even less reason to stay with Windows Phone. Same as the poor W7 Phone debacle.
With a 1020 - this build with a crippled camera app is not an option. Rolled back to 8.1, where it is stayng for now.