More recently, it involes traveling to a solid internet connection, downloading incremental updates and distributing them on location.
In Australia, satellite internet was subsidized in the 2000s (and easily eligible). Now, although still subsidized to some extent, you're on your own if you're on a supported line but your telco doesn't have the capacity.
It's a damn nightmare when large software is distributed in this manner for people with insufficient network access.
Note, this experience is from a small family business point of view, without dedicated tech support.