Happy 6P owner here. Prefer the stock Android and timely updates of Google phones. I have no problem paying flagship prices for a top end phone, but I want 2-3 years use out of them. My concern about the P3 generation phones is they don't seem very future proof. 4GB of ram may be OK now, but in two years? 5G is just around the corner (at least here in LA) and will surely be included in flagships before the end of the P3 lifespan. As someone said on another thread, the P3's are like 's' versions of the P2 - minor upgrades and better screens. Google can spin the 'we don't play the specs game' BS all they like, but part of the 'specs game' at this price point is longevity of quality usage.
Looked at the P3's at Best Buy. Frankly, I prefer the hand feel of the metal N6P. All glass does nothing for me and don't understand the appeal (wireless charging, pfft - fast charge is so quick it's unnecessary IMO). I've been targeting the P3 as my N6P replacement since passing on the P2XL's crap screen, but ATM $900 for a P3XL doesn't feel like a good long term investment. Would look at the 1+6 as a tide-over but must be on VZW, so no-go. Honestly not sure what to do and may just keep the 6P for another year.
(Note: I don't use the camera much so the Pixel's strength doesn't play to my needs.)