I was deadest on upgrading to the 2019 iPhone after skipping out on the XS series. Not that there was anything wrong with my X, but I had bought it open box for $700 at the time when it was selling new for $1150-1200 for the 256GB IIRC. It was a great deal, the phone was still plastic wrapped!
Fastfoward 2 years, my battery isn't lasting nearly as long as it used to, and I'm having issues holding apps open in memory. To make things worse, certain actions are becoming sluggish.
Last night I sold my X for $600. I couldn't believe it. Immediately went to Best Buy and bought the last Space Gray 256GB iPhone 11 Pro Max they had in stock. It's been less than 24hrs since then, but here are my quick thoughts.