But if you knock kobolds, goblins, orcs, hobgoblins, gnolls and bugbears off your standard encounter lists, then who the heck will man the Caves of Chaos? This might seem a minor point to you, but when pondering big changes to the game I often think about The Keep on the Borderlands as something approaching as Platonic ideal in the realm of D&D. If a proposal renders module B2 unplayable, then I'm not sure I want it.
But then I thought about Blazing Saddles.
I want rustlers, cut throats, murderers, bounty hunters, desperados, mugs, pugs, thugs, nitwits, halfwits, dimwits, vipers, snipers, con men, Indian agents, Mexican bandits, muggers, buggerers, bushwhackers, hornswogglers, horse thieves, bull dykes, train robbers, bank robbers, ass-kickers, shit-kickers and Methodists.
The Borderlands are basically the Old West redacted to Mythic Caucasia anyway, so why not draw on a source like this?