Transmission fluid flush vs drain and replace fluid

I work at a Honda store and the 30k by the book is a full fluid/filter exchange.
Oil, trans fluid, brake fliud, per steering, and coolent all get changed out for fresh.

gsragtop:
When you make reference to “by the book”, are you referring to the maintenance schedule published by Honda motor corporation? Or are you referring to maintenance schedules often published by dealerships?