Wanted to provide a timeline for anyone still waiting on update .. (btw, my car is on WiFi, but I don't believe that the upgrade process requires connectivity; according to my router logs, the upgrade files were downloaded a few days ago).
Began upgrade at 9:05AM EST => 0%
1 hr later at 10:05AM EST, => 5%
1.5 hrs into upgrade (10:35AM EST), => 10%
2 hrs into upgrade (11:05AM EST), => 27%
Sometime prior to 2.5 hrs, it was done (at 11:27AM EST, I checked and the mobile app looked normal w/ "waking up car" msg on screen) .. I opened the car at 11:31AM EST and the screens powered on and looked ready to go practically "instantaneously". .. 2.0.5 upgrade is done!
Played a bit w/ Tidal and audio .. much better. Surround View = remarkably better (and, although I'll admit, I am color blind and didn't think it was a big deal, the car avatar is the correct color)
will keep playing ..