[Macha]

So my thunderbolt ports are:

* One port dedicated to a monitor * The second has to do double duty, swapping between ethernet ports and another monitor as needed.

I also have a USB->DVI adapter (https://www.engadget.com/2013/05/11/kensington-usb-3-0-multi...) when I need both the monitor and the ethernet port, but it's crappy. (Flickering cursor, occasionally cutting out, some applications like IntelliJ and Sublime Text have issues rendering on that monitor)

[Symbiote]

If you don't need the speed, Apple sell a USB to ethernet adapter. I think it's only 100 Mb/s.

That could then go in a USB hub, which my Apple display includes.

(I haven't tried this.)