I can’t really speak to this except to say it was published before White Wolf became popular. Any of the early RPGs from the mid ’80s can set up rules and a setting with half the pages than an RPG can today. Jeez, Cubicle 7 felt the need to do a book for every damned Doctor in Doctor Who. Each D&D core book — Players Handbook, Dungeon Master’s Guide, etc. is 400ish pages. The AD&D books did it with half that.

Now, get off my lawn!