After my two previous updates failed, I got another one yesterday. This time I decided to drive outside my garage and made sure I had at least 3 bars on the LTE signal.
The update kept failing after 5-8 min. with the message "Unable to apply update, please try again later". But the update icon remained available, so I rebooted the car and tried three more times without luck, same message. Then the last time it failed it showed numerous messages/errors in the center screen, everything from "low battery power", "disabled emergency braking" ect, it stopped at "Software update required, please contact Tesla Service".
So I decided to just run the update again, without rebooting. This time it kept going longer. That was an interesting experience
With the screens restarting several times. Plenty of sounds coming from the car during the update, clicking noises, fans starting up and shutting down, a strange ride
This is the moment you wish there was some kind of progress view, either on the app or on one of the screens. You have no idea what is going on....
After more that an hour, the update was successful!
Finally!
As for the update itself, everything is already mentioned. Faster, snappier MCU and browser. Spotify loads quicker and does not hang.
One thing I noticed for me, is that before the update. LTE speed was max 2.0 MB/s, after the update it has jumped up to 20.0 MB/s! nice!