Well the fundamental difference is that homes today are expected to be climate controlled year round. That negates pretty much any issues with normal moisture control. That being the case efficiency is a much larger concern.
It matters where the cold condensing surface is in your wall, and what you do with that moisture.
If you took a cross section of wall, and you have interior temp (20c) on the inside face of the wall and exterior temp on the outside face section of wall, somewhere inside that section you’re hitting the dew point and condensation will form.
