A bulky but reliable option is the $29 Apple “Thunderbolt (1) to Gigabit Ethernet adapter” connected to the $49 Apple “Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter”. It’s gigabit and PCIe using the rock-solid BCM570x chip.
Professionals need all the stable connectivity they can get.
I was elated to hear that Apple is being forced to abandon Lightning on iPhones, and I'm normally not much for government meddling.
In both cases it simply stopped appearing on the bus, but was clearly "running" to some degree - it would get warm to the touch, just as they normally do.
I've also found that the Thunderbolt connector's lack of a "click" engagement to be a serious issue for storage, network, and even display - every Mac I've seen it in use, the connection has been flaky. It really fucking sucks to whip out the thunderbolt adapter and plug into ethernet for "reliability", set up a transfer of a ton of data, and half-way though shift the machine slightly aaaaaaaaand then the ethernet adapter disappears and your transfer is fucked.
Happy to see them drop that idiotic connector for USB-C, as at least that has some sort of physical retention mechanism other than "hopes and dreams" (ie: rely on proper clearance tolerances between different vendors, on surfaces that will wear with use.)
I've also had good luck with whatever Caldigit uses in their Thunderbolt Mini Docks (not at my desk to check and see what chipset's in mine).