We stored a couple of our cars at a friend's for a week and didn't bother connecting them to his wifi. The Model S indicated there was an update available but we needed to connect to wifi to download it. The Model 3 downloaded it automatically over LTE.I can confirm. Same thing happened to my car. I'm still on 48.5, been avoiding the "holiday update". This morning got the app notification to install 48.35.5, which means the car has actually download the update
That's what I thought too. I came in here just to confirm this, didn't take me long. I am still not going to press the install button. It can nag me for as long as it wants.