That’s not actually true. That’s androids Demo, not apples.
Do you have any data to back this up? Looking at version market share, I'd say that there are way more people using older Android phones (1)(2). The second most used OS (10.X at 18.1%) goes as far back as iPhone 5 and the most used (11.X) goes as far back as 5S.
(1) https://www.statista.com/statistics/271774/share-of-android-... (2) https://david-smith.org/iosversionstats/
The successors to the iPhone 5 and KitKat were released around the same time (late 2014) but new Android devices, especially low end devices, continued to ship with KitKat long after that. KitKat was still supported by Google until 2017.