Malcolm Young his brother had been experiencing lapses in memory and concentration before the "Black Ice" project and had been receiving treatment during the Black Ice World Tour which ended in 2010. Angus confirmed that although his brother did not play on the 2014 "Rock or Bust" album: "He still likes his music. We make sure he has his Chuck Berry, a little Buddy Holly." He added that AC/DC would continue according to his brother's wishes and standards: "Look, even with his health, Malcolm was touring until he couldn't do it anymore." In that same interview, Angus stated that Malcolm was rehearsing
Malcolm Young volume with little or no gain. This is contrary to a common belief of many rock guitarists that rhythm guitar should involve loud and overdriven power chords through large amplifiers. Dave Mustaine of Megadeth stated in a 2004 interview that he considered himself, Young, Rudolf Schenker and James Hetfield of Metallica to be the best rhythm guitarists in the world. In 2006 he was the subject of a song (and album) title by Australian punk rock band Frenzal Rhomb: "Forever Malcolm Young". In 2017 Gretsch guitars reissued the Gretsch G6131MY, a ‘signature’ guitar based on Young's modified 1963 Gretsch Jet