I really like and enjoy my new Oppo Reno 2Z with ColorOS 6.1 (still Android 9):

It's a simple, smart and elegant UI with a lot of features. First Screenshot is my Home Screen where I have 5 App folders with everything sorted by G-Suite & Tools, Social Media, My Devices (so apps for Headphones and Smartwatch), Applications (so Spotify, Shazam, banking App) and MS Tools. I always rock clean & minimalist wallpapers, this one of a forest is just a stock one from Oppo. 

And then the second screenshot is the Smart Assistant shelf on the left, here I've got the Calendar (it's the Google Calendar) and the Temperature and weather conditions of my Home Town.

ColorOS 7 (with Android 10) is supposed to come out next Month. Best feature: System wide dark Mode.

I will write a full review of the Reno 2Z and Switch Lite (and Bluetooth adapter) in the Ski Holidays.

So stay tuned.