Coming from a 2019, just took delivery of my BL 22. I would also add that the sync upgrade goes beyond your main screen. The instrument screen and the HUD is now more tightly integrated with sync. I use android auto and waze all the time. The turn by turn is in all the displays now, not just the main screen. The instrument screen also has new graphics. Cameras and views are all better too. Little things you notice that don't show up on reviews.
The wireless Android auto has worked flawlessly.