And if it was a huge plethora of 20 races, the book would be oh, 400 pages. Because "Why stop with 20 races, why not put 20 classes in too?" and so on.AWizardInDallas said:D&D used to be fairly encyclopedic and it's not anymore; we should be seeing a convenient, generous catalog of core races not just a handful. D&D has been around for over thirty years and still the PHB contains only a handful of races. Why? Supplements make money.
Seriously, what do you expect? How many races did the 1e PHb have? The 2e one? Where is this encyclopedic quality coming from, because I've never seen tri-keen and gith and drow in any PHB. So D&D has never been fairly encyclopedic; it's not new.