the main goal of Apple update, the more you update your Iphone , the performance will be poor, in that case you going to end up buying their new model (8 and X) thats whats behind their update.
btw i feel this a good time to remind you guys that sea of thieves was made by rare, who also made DKC1-3 and DK64, alongside banjo kazooie and conker's bad fur day