Had a 7+, opted to try Pixel 3 regular (on contract $99 cdn, vs XS $599 or X $399) got free pixel stand. the moment I used my pixel I sort of realized the regret. The bigger design was a benefit, bezels and all just easier to hold while pixel was tiny. I've played with the XL and yes I made the wrong decision, X size is much better to hold compared to small pixel 3. That's just physical design, application and UI of iOS is much better imo.
While going back to Android was a pleasure mostly on Pixel and how light weight it is, I missed too much from iOS. Recent amazing carrier deal on clearance X so jumped on, love it and sold my Pixel. Android you're good but sorry iOS is just much better suited for me.
I didn't consider XR as I do love the OLED display, My only dislike about 7+ was screen quality. The iPhone 11 looks amazing, I could see why some want the newer phone, if you are ok with LCD panel then bonus. I couldn't do it, I'd have to go to Pro personally.
No I don't plan to upgrade until 2021