Original sentence: While most, if not all of these recordings are of an unknown origin and have not charted and had not been reviewed, they still are very popular among fans who believe the band's live performances often overshadow their studio works
Edited sentence: While most, if not all of these recordings are of an unknown origin and have not charted and had not been reviewed, they still are very popular among fans for the very fact that the band's live performances usually overshadow their studio works