It might be understandable after the movie had come out and everybody had seen it.
Nobody was talking about Atlanta or Community, everybody was all about Lando.
The fact is that everybody was all about Lando after Solo: A Star Wars Story was released, but at this point, only his casting had been announced, the movie hadn’t even gone into production yet.
News travels pretty fast in the entertainment world and it seems that word of Donald Glover’s casting traveled so quickly that even a guy who is probably used to being recognized on the street and getting asked for autographs was “kinda freaked out” by the way people were reacting him.