Vanuslux said:
Their niche is living constructs designed for use in war. Any setting with lots of magic and a war...any war...has an excuse for Warforged to exist. The specific hows and whys of their creation can easily be adapted.QUOTE]
My trouble with this is that presumably, EVERY setting has war. The existence of war isn't enough to justify them unless they can be built for less than what it would cost to maintain an army of plain ol' humanoids. What bugs me about moving them into other settings is precisely that they need a "how" and a "why" that are not required of the other races.
So because the excuse for warforged to exist in their niche is common, that makes it invalid? Sorry...that makes no sense...saying every setting has a war only proves my point. The basic concept of warforged is living constructs created for war. If every setting has a war, then every setting can have warforged and they can be explained pretty much exactly the same way they are in Eberron. That doesn't mean they have to exist in every setting, but it does mean that it's pretty darned easy to explain them if you want them in the setting. They're certainly easier to move to a generic setting than Drow.
As for why not use an army of plain old humanoids...Eberron's explanation for that is pretty tranferable to...just change the names. Beyond that, there's a lot of expenses to fielding a living army that you just don't have with warforged. You don't have to pay them, you don't have to feed them (and therefore are not nearly as vulnerable to tactics that involve cutting off supply lines), you don't have to armor them...or even clothe them. Unless you're a fantasy liberal that wants to recognize living constructs as sentient creatures you don't even have to have any kind of conscience pangs about sending them on extremely dangerous missions that are almost certain suicide. They don't get old. They don't catch cold. You don't have to worry about enemy necromancers sneaking diseased blankets into your army's camp to spread deadly disease, then taking that same army and turning it into their undead army. I could go on and on about all the reasons that I'd want to have at least some warforged at my disposal if I were as king in a high magic fantasy world.
If you can't justify warforged in your setting, it's because you don't want to not because it's not easy to do.