Maybe it has to do with the culture at specific schools. As I mentioned in another comment, my instructors loved to include wire resistance in their problems,

Maybe it has to do with the culture at specific schools. As I mentioned in another comment, my instructors loved to include wire resistance in their problems, and always explicitly stated the zero-loss assumption when applicable. We did have a healthy incubation program, where instructors helped companies with product development, so perhaps that is what brought the real-world experience.