Ancalagon
Dusty Dragon
There's a wound you don't want salt in!
The adoption rate has been sluggish.
Seriously speaking... I have a "dual" policy.
My campaign is a bit unusual because I both allow and disallow certain races. The PCs have the choice of being locals or being foreigners. The foreigners can be any "standard" D&D race they want (although I do warn them in advance about how certain races would be perceived). The locals have a smaller choice set, but this set includes "non standard" races: - human, slugmen, crabmen or dwarves. In the future I would consider expanding this set to some of the Volo book races as well.