Cadfan said:
So, lets say in the 3e Complete Pancake they create the Arcane Griddler class. There might be some Arcane Griddler specific feats in the Complete Pancake, and you might get an Arcane Griddler article in Dragon Magazine, but for the most part after the publication of Complete Pancake you'd never see another bit of material for the Arcane Griddler again.* The assumption was that most people didn't have the Complete Pancake, so material for the Arcane Griddler would be useless to them, and material that incorporated the Arcane Griddler would be difficult to use.
It's 7:30 am, and I could really use a Complete Pancake right now. Alas, it seems I failed to choose the Arcane Griddler paragon path (ParP) in lieu of the poorly-optimized Omeletmancer. Looks like I'm SOL on that until I retrain.
On an entirely unrelated note, in PHB2 we may well see full race write-ups of a number of races that appeared in the MM1 as "monster races." Examples include Warforged, Shifters, Hobgoblins (?), and Gnomes (as has been mentioned). We know that Warforged are getting an early DDI update to improve on their MM options, but it would seem to make sense that the PHB2 would include the full collated write-ups of races like this, especially cuz it would a.) introduce bits of the Eberron setting to 'mainstream' players and thus advertise for the Eberron Campaign Setting that same year, and B.) free up space in ECS for more awesome goodies.
And if the Psionics power source is introduced (as seems highly likely) then that opens up an even wider range of potential races, including Kalashtar (Eberron again), Elans, Thri-Keen, the cute little bug guys, etc.
So they could easily match the 8 races in PHB1 with all this available material, and I have a feeling that future PHBs will in fact have about as many new races and Classes as the original (8 and 8), certainly more than just 3 or 4 at any rate. And of course Paragon Paths, Epic Destinies, Magic Items, Feats and such-like. At any rate it's not like they have to reprint the basic combat/skill rules... I assume.
Now, what might be found in DMG2 and above? That's a much more interesting question I cannot begin to speculate upon.