Noticed some problems after updating to Android 10
1. UI feels quite laggy. Very much notifiable while using Maps by Google, as if the screen is not running at 120Hz.
2. Poorer RAM management, apps close in background, webpages reload more often than used to happen earlier.
3. Not receiving all SMS: While using SMS organizer app by Microsoft, I've noticed I do not receive all SMS sent. The default app receives them fine. But this proble was not there in A9. This could be a problem with the app also.