Update after using the iPhone X for a couple not months now:
I’ve never touched my Lumia 950 even once which says a lot to me as I always go back to Windows phone when I buy any android device.
Recently went I. A Disney trip with kids and took my Lumia 950 for photos. But n get ended up using it. The iPhone X battery amazingly lasted the whole day for about 13 hours in the park. Always used for GPS, photos and wait times for rides, emails and Whatsapp. I never had a phone that has this kinda battery life. Even though the battery size on iPhone X is quite small Apple seem to have mastered the power optimization n this device.
Can’t see myself going back to android again. May be if Microsoft comes up with the surface phone.