I was surprised that there was surprisingly little support for this request.
I wonder if this is related to the fact that objects such as furniture can be moved and placed in half-tile units, but buildings themselves can only be moved and placed in single-tile units.
I think if it were possible to create walls and platforms in half-tile size, it would create a lot of diversity in the buildings themselves, but would it be difficult?
Some of the landscape buildings placed in the world have exterior decorations that look like half-tile-sized platforms. As I look at them, I wish I could one day build a building like that myself.