An increasing number of people are complaining that their iPhone X handsets don't last as long as they should, and are experiencing faster battery drain.
Two years ago, Apple surprised the smartphone world with the release of the iPhone X, the first handset to feature a notch, advanced Face ID, and a totally new look. The iPhone X's design was so popular that many handsets released after it copied or at least tried to mimic how Cupertino's smartphone looked like.
http://ibtimes.com/iphone-x-users-experience-faster-battery-drain-issues-2892803/
Apple employees are so trained to consider the end user that they prioritize any project that will affect the user’s experience. This user-centric tech giant proves with every new product release that its customers can’t wait to buy again and again.
Other companies would do well to prioritize the user experience as Apple does. Many try, so long as they get budget approval. Unfortunately, most companies don’t understand the right way to measure the effectiveness of their UX design -- not to mention how to improve it.
https://www.entrepreneur.com/article/322036/
It was, for some people, the confirmation of what they'd known all along: iPhones were being secretly slowed down by Apple to make people buy new ones. For others it was a public relations nightmare, ruining all the hard work they'd done to dispel myths about the iPhone by appear to confirm those myths, even if they didn't really.
http://www.independent.co.uk/infact/iphone-slow-apple-battery-replacement-cost-price-how-to-explained-latest-a8159826.html/