Going to read past threads....I'm really loving the whole 10" screen but I do like some hard buttons like volume at the minimum.
Headunit in the E53 is only really used for Spotify BT audio, Waze audio and phone usage.
Don't even use the Navi on the headunit at all.
It's all about Waze
When it's being used in areas driven unknown, Carplay is use to see the exact street/map for visual turn by turn.
Don't think I'll do ugrade the HU but these recent post with the 10" pr0n. Size matters