Yes I found the Wi-Fi client functionality (not hotspot) is disabled on MY17. Shame as that puts out the ability to use the Audi Connect wifi services for me, as I cannot be bothered to purchase my own SIM or the hotspot data plan from Audi so my phone can access the Internet via the car. I'd rather have the car tether to my phone - but never mind...
As for map updates, I did mine via the embedded SIM. Actually it's not too badly thought out, as I kicked it off and forgot about it - few hours later (after lengthy periods of parking) I got a notification that the update was installed! So it seem to have the ability pause / resume by itself. During these times that it was downloading I was still able to use the nav system.