Totally agree about WhatsApp as I no longer use it due FB shenanigans. A lot of people do though which is interesting as it so easy to move.

Using things like Signal and WhatsApp may reduce your footprint further.

I’ve used wifi calling from hotel rooms overseas as well as locations where mobile coverage is poor and it works fine. I suspect (not know) that the voice network provider knows pretty much where your location is though.

The Canon driver needs to be installed on Fedora and has never worked out of the box without some tweaking. Canon is not really in the Linux support game.

The Canon Pixma has always problematic for me with driver issues.