Again I think there is a pretty big impasse here on what constitutes support and we have all made the same basic arguments over the course of the thread, so I don’t think there is much new that can be added to this part of discussion. But I think the OP seems to be talking more about Freeform RP and using basic GM-Player dynamics to work out character driven stuff. Which works fine in D&D and the game largely supports by not getting in the way. But as people have pointed out various editions have provided mechanical support. Reaction adjustment is a simple and elegant way to help manage f at octal interaction, without interfering with what characters say. Attribute rolls are extremely flexible and be used for all kinds of things that might come up in social interactions. NWPs covered plenty of ground, generally without Getting in the way of RP. But 2E had numerous supplements including a book that included a range of skills, and new NWPs in the various brown books. The complete bard got example gave you all kinds of material for figuring out the non combat aspects of the bard. A lot of that was info and flavor but info and flavor are support. 3E positively had stuff for covering social interaction. There was gather information, bluff, diplomacy, intimidate, etc. I didn’t make the shift to 4E so will let others tackle that one and same with 5e (have minimal experience playing this one).