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I've done it while away, overseas, and not going to be back or over a month. However, I've also chosen to wait until after I return.
Now if the car was not at your home and not plugged in, then I'd probably suggest you wait. Since neither of those apply, not much different than you were at home. Biggest risk is something goes wrong and the car is non-responsive. But that risk really no different than if you were at home in your house.
I’ve installed while on long road trips and I’ve waited. It depended on the update and how near I was to Tesla Service. FWIW, I would wait 3 weeks until, I got home.
No benefit to doing an update if you’re not going to use the car. If you don’t already have the Holiday Update, you’re probably not going to like it anyway.
No benefit to doing an update if you’re not going to use the car. If you don’t already have the Holiday Update, you’re probably not going to like it anyway.