Allen Feldman: Bluegrass defines bluegrass as "a modern, very urbanized genre, connected to the 19303-1950s industrialization of rural southerners, that drew on a diversity of musical genres that were available through radio and phonograph...." He would go beyond the concept given by Richie. He says that there can be no name that covers both.

Going beyond Feldman, modern groups are attempting in various ways to fuse (add, subtract or change these monikers as you wish) Old Time, Appalachian, Country, Bluegrass, urban, rural, Celtic, Breton, Irish and whatever- but this remains modern Fusion music- interesting, but depending upon a sophistication that is foreign to the separate genres.