I understand that their systems may be simpler for their uses, and it's possible that for this reason they use Maxwell's equations and things like that: But how

I understand that their systems may be simpler for their uses, and it's possible that for this reason they use Maxwell's equations and things like that: But how can they not mention it, even once? I would personally expect these equations to be revered in every Classic Electromagnetism book. Okay, so they are not revered, maybe my taste is a little peculiar, but they are not even mentioned! I just can't understand it. Think how much Maxwell's laws are revered, and this is one formula that contains them all and more, in one line. Don't you think that they would mention it? That's what's baffling me. Do they not know this? Do they not care? How can they not care? About your PS: Yes, I'm working on writing this.