What makes Rex, Wrecks & XXX by Evan Parker notable?

'Rex, Wrecks & XXX' is significant for its ambitious length and structure, particularly the 41-minute track 'XXX', which challenges traditional listening formats. The album has been noted for its contributions to the conversation around free improvisation and has received critical attention for pushing boundaries within the genre. By 2013, Evan Parker was a well-established figure in the free jazz scene, known for his innovative approach to improvisation. 'Rex, Wrecks & XXX' marked a continuation of his collaborative efforts with diverse musicians and showcased his mastery of extended techniques on the saxophone, following his earlier works that had solidified his reputation as a leading avant-garde artist.