Sturgill Simpson has released 5 Albums, 1 as Johnny Blue Skies, 2 compilation Albums, and had 2 with the Band Sunday Valley.
Each Album, besides the 2 SV and the 2 bluegrass compilation albums, has been different musically.
The first, High Top Mountain, is true blue old-school country.
The second, Metamodern Sounds in Country Music, is psychedelic country
The Third, A Sailor's Guide to Earth, is a groovy, country, soul album w/rock elements that is outside of any genre
The 4th, Sound and Fury, is a hard rock album
The fifth, The Ballad of Dood and Juanita, is a classic country concept album (think Red Headed Stranger)
His Johnny Blue Skies Album, Passage du Desir, is a mix of soul, rock, and country elements.
He is a musical chameleon.