[synthmeat]

> How hard is it?

Just keep both network interfaces fired up, and sort them by priority in Network preferences panel (I assume ethernet, then wifi for you use case). Then you can forget about everything and do work, tethered or not.

Turn the bluetooth on as well while you're at it.

This is the way.

[cyberpunk]

This worked; I didn’t know this was even a thing, so — many thanks synthmeat!