I'm starting to think that having old versions of an OS running is not a bad thing.
Especially when that OS is iOS. I had to buy new iPad minis after mistakenly "upgrading" my original ones.
Too many OEMs selling new devices on old versions. .
Or perhaps more older Android devices are still hitting the Google Play Store. Remember where these OS stats come from for both iOS and Android: it's from users hitting the respective app stores. NOT from actual total device percentage in the field.
These charts might indicate that older iOS version users often simply cannot run the latest code and have given up. OTOH, Android gives developers code wedges so that even newer apps can run on older OS versions.
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Plus just saying that an Apple device is on a certain iOS version, is virtually meaningless when it comes to features. Many times, older Apple devices are not given the latest OS features. Instead, they mostly just get a later OS version that slows them down.
Moreover, with Android's more dispersed OS, users do NOT have to update their OS just to get better Maps, Mail, Video, etc, like iOS users must.
These are simply two totally different OS upgrade models. Comparing them directly is wrong.