Clarence White and Tony Rice were ignored. These guys along with Doc Watson essentially added solo flat picking to the bluegrass world and they influenced every following generation in a huge manner. Chubby Wise who played in Monroe’s early group introduced a bluesy jazzy swing to bluegrass fiddle and he was ignored. He was a game changer for country fiddle. Bill Keith who introduced chromatic (more melodic) style banjo to bluegrass in one of Monroe’s groups was ignored. All the bass players were ignored. I think a history doc should be some what linear - covering all the phases over the years. This doc focused on the founders and the current generation while offering much less coverage to the middle years that produced some of the genres best music. Having babbled all that I would not argue that it doesn’t provide a decent intro to folks new to the genre.