For world-building, I actually mostly agree with you; in general, campaign settings poorly integrate higher level elements. I believe this is because the higher level elements feel distinctly out of place and uncharacteristic and uncomfortable to the fantasy that most of us know--hence my love of lower level play and my like of the E6 paradigm in general.The implications of an E6 world aren't actually that special. All it really takes is to make a fantasy world that does not include the powerful magic and the frequency of dragon and demon slaying warriors common to the D&D rules. Unless you specifcally put those things into the world, then using the E6 variant doesn't really change much.
Maybe it's just me, but that is precisely the value I find in D&D. The fact that D&D is the only (well known) game to do this makes it valuable for exactly that reason, as far as I'm concerned. If I want other, gritty or low-magic experiences there are plenty of alternatives available to me, but for demon slaying - not really so many.Yes, but fighting demons is something that seems to be common in D&D and almost nowhere else.
Elric (and Coram, Hawkmoon and so on) - lots. But Conan mostly had "beasts" and humanoid "things" that don't really compare to D&D's "demons". We could debate minutiae for ages, I'm sure, but I still think that you won't find many RPGs that do high "level" adventuring - venturing into the Hells and returning with the captive Angel, or whatever - at all well. Even D&D isn't that good for most of its editions - 1e and 4e are the only ones that really cope at all well, I think.Demon-slaying is actually pretty common in the source material. How many times did Conan or Elric have to deal with demons?
I don't see how that's at all unique to D&D.
Yes, but fighting demons is something that seems to be common in D&D and almost nowhere else.
Please: It's Corum!Elric (and Coram, Hawkmoon and so on) - lots.