As some of you know, I purchased a Late 2016 Apple MacBook Pro. I recently had the need to purchase a HDMI video out adapter. So, naturally, I went for the more expensive route, and purchased the $69 Apple USB-C Digital AV Multiport Adapter.
What I found interesting the first time I plugged it in was an alert in macOS Sierra to update the firmware on the dongle. The update is a minuscule 204kb. In today's world, that is super small. As you can see from the images I captured below, Update 1.0 is a "compatibility and reliability" update. Since this was the first time I used the adapter, I did not notice any problems.
In my daily usage, these kinds of updates are fairly infrequent. The last accessory update that I recall seeing was for the Apple Smart Keyboard for my first generation 12.9" iPad Pro. Before that, a minor update to the firmware on my PowerBeats Bluetooth earbuds. I like to think that these kinds of minor updates are not generally required because everything "just works", but I am glad that Apple issues these updates to fix issues and generally improve the user experience.