XR for me.
Honestly the biggest issue that was pushing me to update was that my podcatcher had been getting laggier and slower to respond to remote commands when minimized. I thought it was a ram constraint, but the developer refactored the 10 year old code base last month and now it’s zippy as heck.
Now, my only issues are ones expected of any phone of its age: battery wear (repairable), RAM limiting minimized persistence of modern apps (no compelling leap until maybe this year) and storage space (manageable). I am looking forward to MagSafe, USB-C, Oled and left behind support for AirPods whenever I eventually do upgrade.
And even with the battery; it’s not about the size, it’s how you use it.