I am not sure what you mean by talking about delta kites only, as it is not a "new" feature at all ?
(assume it is because you have a delta kite, and maybe compare to higher AR C kites ?)
Since 2004 and the first bow kites, this was one of the best and most useable features that the C kites could not do unless extremely stable wind (and there never is, on land).
AR did not matter much - it was the sweep that made these kites so stable both in the air and on the "tip" on the ground
So agree - this feature is a thing used over and over, and come to think about it - maybe almost every session or more (did it as late as today, when I had to dismount a difficult mounted GPS from my helmet, and put it on my arm instead