In its early days, Android was a slow and buggy mobile platform. Even the most powerful smartphones that were released each year would experience stuttering and stammering while performing the simplest of tasks, like scrolling or opening apps. And if your Android flagship phone was actually doing some heavy lifting like playing a resource-intensive game, it was a total mess.
http://bgr.com/2018/02/07/best-android-features-hidden-menu-increase-speed/
“Although the Galaxy S9 may not have the innovative features expected by the market, we are focusing on enhancing the completeness of the Galaxy S8 hardware and an innovative user experience (UX),” a Samsung said all the way back in mid-November. More and more Galaxy S9 reports were painting a similar picture at the time. The Galaxy S9 would not bring over a brand new design. Instead, Samsung would repackage the Galaxy S8 with new hardware and software tricks this year.
Fast-forward to today, and you’ll see a rumor that says Samsung invented new UX features for the phone never-before-seen on previous Galaxy S models.
http://bgr.com/2018/01/24/galaxy-s9-rumored-to-deliver-a-brand-new-user-experience-with-never-before-seen-features/
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/