What do you mean? I think Mearls was (infamously) influenced by the OSR which had revived OD&D and Basic in distilling their gameplay assumptions. So in that sense, aspects of 5e, like its relative simplicity and core game loop, probably owe something to basic. At the same time, they didn't include very explicit exploration procedures, and other elements of the class design are very cumbersome compared to basic. But the initial marketing struck me as very 1e and 2e nostalgic, both in the idea that a dnd campaign is this long epic story (2e) but also in the specific adventures they were reimagining (elemental evil-->princes of the apocalypse, against the giants-->storm kings thunder, etc).5es nostalgia play is for Basic, not AD&D. Subconsciously I think it’s one of the reasons I’ve liked it so much.