Why do our phones, which certainly felt damn snappy the day we bought them, inevitablely seem to slow down to the point of unusability after a couple dozen months? Even after a factory reset and installing no apps at all... I know it didn't take that long to open/close the built in apps when I bought that iPhone 4, 5, 5s... The only thing I can think of is the flash drive is slowing down as it wears. Or, the CPU cloc…
My iPhone 6 used to be snappy, but now takes almost 10 seconds to just open an app. Perhaps new OS updates are not as well-optimized for older iPhones as they are for the latest version. Ars Technica's Android 8.0 deep-dive has some interesting charts showing Android device performance deteriorating over time: https://arstechnica.com/gadgets/2017/09/android-8-0-oreo-tho...
Unfortunately I'm now at end of life as far as iOS updates go. I don't think I will bother with updating the hardware for some time yet.