Earlier quoted context omitted.
I think one thing is buildings are now are built closer to their required engineering tolerances. In the past many building were massively over engineered, while modern buildings seem to be built for their exact expected lifespan. The one thing I really hate about most modern buildings here in Australia is the ceiling height has been reduced. A lot of modern buildings have ceiling heights around 7’ while old building…
High ceilings help when you don't have air conditioning. They are nice aesthetically but unnecessary and even detrimental (more air volume to cool) when you have it.
With active heating/cooling, what really helps is better insulation. In Scandinavia and Germany people are insulating walls in new houses with 40 cm rockwool, or the equivalents thereof.