Macrumor's article: iOS 9 to Focus Heavily on Stability and OptimizationSo far, no x.0 release *ever* focuses on stability and optimization, least of all iOS 9.0 !
Until last fall 2014, Apple was still selling the iPhone 4S, with just 8GB of all sizes and people are still paying it off on their 2 year plans right now. Coerced (mandatory if you want Genius service) upgrades have diminished usability of a phone still used by millions of people.
Only smug elitists would tell them to "just upgrade your phone". People might, if those devices would only cost $100, but
$500-$1200 upfront or thru a plan certainly justifies those users to complain about an unnecessary high depreciation rate as well as impeded functionalities.
Imagine car manufacturers updating vehicles' software every few months to the point that 1 year later, it accelerates less fast, guzzles more gas and every time it goes in for service, the sales guy comes over and tries to sell you the latest model for a $50 trade-in discount.
smh
https://forums.macrumors.com/threads/ios-9-to-focus-heavily-on-stability-and-optimization.1845435/