Optimizing games for legacy devices makes sense. A fifth of the iPhones in circulation were released before 2014.
These figures can be found in the Newzoo report dedicated to the iPhone decade.
By June 2017, Apple had sold 1.2 billion smartphones. 730 million of them are currently active. Of this number, 82% were released in 2014 and later.
It is clear that in order to increase the chance of receiving promotion from Apple, it is necessary to support the functionality of the latest Apple devices. But this does not mean that you should forget about the rest of the audience.
Newzoo also notes in its research that the largest number of active iPhones are now in China. There are 243 million Apple smartphone users there.
The USA is in second place in terms of audience. In this country, Newzoo counted 134 million iPhone users.
Source: Newzoo