My 6S (Plus) is plenty snappy on iOS 14. Although I did swap the battery out under the free replacement program a few years ago. If general system sluggishness

My 6S (Plus) is plenty snappy on iOS 14. Although I did swap the battery out under the free replacement program a few years ago. If general system sluggishness is your primary impetus to upgrade an older iPhone, I'd highly recommend a battery replacement first. They're actually fairly inexpensive even directly from Apple[1], in the context of a $1k+ upgrade. And will absolutely feel like night and day if your existing battery is several years old. [1] https://support.apple.com/iphone/repair/service/battery-power https://support.apple.com/iphone/repair/service/battery-powe...