There's no excuse: All Android phones (even Samsung's) should run stock Android

PCWorld 

Back Android's early days, the system's open-source generosity offered a huge advantage to phone manufacturers. In the Android Eclair and Froyo eras, there was palatable whimsy in interface design. Owning an Android phone was fun, and manufacturers developed identity by interpreting the system in their own special ways. But the modern Android experience is a mess of unnecessary customizations, ugly designs, and bloated app drawers. In short, Android's biggest problem in 2018 may be Android itself.