I just upgraded my iPhone 6 to iPhone XR. It is mainly due to the long loading time of iPhone 6. It was never a problem at the beginning. But since Oct this year, some apps would start to quit in the middle of operation. Then I need restart my iPhone to make everything work again. The only reason I could think of is due to limited resources on my phone. I am thinking why my ip6 was slowed down so much over years. There was battery gate last year, so I took the chance to add in a new battery. I don't see other wearing on the hardware. Then I have iOS 12 and apps left. In comparison to a 5yr old OS, I think iOS 12 requires more resources to run logically, but I don't know if it can burden ip6 so much. Then I think maybe the lag is due to the new app updates, which make the apps more resource consuming over the years. I am thinking if I should disable OS and app autoupdate to preserve my new XR in the current state. For an expensive phone like this, I would prefer using it for a long time like 5 yrs. I still think the screen and body of my ip6 is in a pristine state. I feel regretful to replace it because of the various updates I installed over years.