Reminder that you can actually physically dike out the cellular antenna/telematics module while keeping the rest of your infotainment system intact using an aftermarket wire harness[0].
I wonder if there's a market for a company that makes affordable custom short extension or Y-splitter wire bundles, using 3D printing to cover all the innumerable automotive and appliance plugs and sockets that exist out there.
It'd make it a lot easier to cleanly (and reversibly) tap some CAN bus cables, for example.
[0]: https://www.autoharnesshouse.com/69018.html