Owner of an MI
The thing about MI is that they don't normally push the envelope when introducing a new iteration of the OS. There is practically zero difference between the MIUI 6.6.7 and MIUI 7. Moreover you won't know which Android version you are using unless you check the Settings. Otherwise most MI flagships are Flagship killers. But with other brands like LeTV and OnePlus, Asus etc, I can only see declining sales for MI.