This is exactly the type of information that gets lost between generations that makes past decisions make sense. It's why I ferverently collect older academic/engineering literature. Not necessarily for the equations, but for some of the context around the problems and challenges of the time we no longer think about because they are "already solved".

Everyone moans about radiators once you start sealing up windows to be more green. Surprise! They were designed with the inefficiency of having an open window in mind for health and ventilation purposes since the turn of the century! Of course you end up with problems when you violate a functional invariant!