Edit. I saw this cable and was almost going to buy the one google makes as well. They include theirs with the phones.
The Google one might be USB 2.0, so it might degrade your transfer speeds significantly. I would stay away from it personally.
Apple should hopefully release another adapter soon to allow the new iPad Pros to connect to USB-A computers. I have a 12" MacBook and tend to use USB when I sync wired for transferring long files (otherwise I use Wifi).
A new adapter is unlikely. An official Apple cable (USB C to USB A as I posted above) would be nice though.