With my hive the only frames that have been fully capped have been the the outer ones.
The 4 inner frames never seem to get fully capped, and have a large central area that the bees hardly use. You can see images in the topic I raised last week. Honey cell capping pattern Last week I extracted just over 3Kg of honey from the frame next to the observation window, and yesterday I extracted just over 3.2Kg from the other outer frame. They have nearly filled up the first extracted frame again but are keeping clear of the central part of the central frames.
My setup is only one brood and one super. I wonder if other setups (double brood) reduce this wasted space.