What's your company's policy on data safety? I would hope there's something in place should your Mac's motherboard fry.
Does this make sense, these days? My phone's connection is a click away, in my Mac's WiFi menu. What does an integrated modem solve?
This is how I have mine set up, when I travel. Open lid, and it automatically connects to my phone. Maybe my use case is different, since I always have my phone with me. I suppose one technical advantage would be the possibility of a better antenna, within the screen.
Data safety isn’t a concern because changes are pushed regularly. The amount of work lost would be at most two or three hours’ worth.