[mirimir]

Right. There are two distinguishable risks from cellular or WiFi modems. One is geolocation by towers or access points. And the other is isolation of the open system from cellular or WiFi modems.

You can't use cellular or WiFi without being geolocated. But as long as the modems are securely isolated from the open system, geolocation information can't pollute your communications. There's obviously the same geolocation issue with broadband.

Also, that isolation prevents compromised modems from compromising the open system, and the accessing data, compromising end-to-end encryption, and so on.

Both are aspects of modems being "treated as compromised/hostile".