Only a few ppl talked about Mi 10 (umi) so I decided to write some info. I've tested most common issues and:
Dirty update from weekly Xiaomi.eu A12 (MIUI v21.12.8) went smooth,
Reboot after installation was even faster than in earlier updates
MIUI autochanged my background
and font (this is quite cool)
Everything looks bigger. Navigation in menu imo is smoother
Booting/rebooting is a bit faster
Google Play app updates is still IMO a bit laggy - but it worked like this on every phone and every FW I've had (I'm a bit pedant and this annoys me a bit)
Google Play System Update is from 11/01/2021 and I can't update it ("Updates are temporarily unavilable, try again later")
We got our Mitu (fastboot) Xiaomi mascot back
Magisk (canary) and Zygisk works good
SafetyNet Pass (McDonalds app and NFC payments works)
DualSIM works (someone was asking)
'OK Google' works on locked phone but it's features are limited (when I've tried to turn off my Xiaomi bulb it want me to unlock phone)
YT Vanced Manager and YT apps didn't need reinstallation and works
Fixed changing ringtones (propably in earlier built but I noticed just now)
Changing Homescreen layout (5x6, 6x7 etc.) works
I do not see any problems with storage both on Gmail nor Telegram nor Bluemail nor any other app
Chrome browser works
Also haven't seen other bugs (but I'm not a pro user)
In few words? Everything works fine. Thanks 4 devs!