This question is regarding the 2/3 height bricks with studs on the side. The two that I am aware of are 99206 and 87609:
If you haven't seen them before, these are functionally somewhat similar to an Erling brick used on its side. I'm curious why these bricks seem to be larger than they need to be. It seems to me that these could fit in more places and be more useful if they were 1x2 and 1x4 respectively. Something like a 1 plate shorter version of 11211 and 30414:
Does the extra plate surrounding these parts create new ways that they can be used? Was mold design a factor in creating these parts the way they are?