On the east side of your grapevine, where the sun rises, you strip all the leaves. That allows for better airflow. On the west side, where the sun sets, you keep a good canopy of leaves to protect the drought. We do it by hand.
I feel like this is next level pruning. Seems fairly obvious, but it’s not something I currently do. Even though it’s pretty obvious that plants that grow east of my large trees do better than plants on the west side of the them. From Slate on Dry Farming.