My N6 earned backup phone status a few months ago. The battery was fading fast after 2 and a half years, headphone jack was wonky, USB port was already broken for months (thank God for wireless charging!)
I moved on to the OnePlus 5 thinking it'd just hold me over until the Pixel 2 XL came around, but the bleh look of the 2 XL, combined with the concerns around it about the display, have me keeping my distance for now.