While not unexpected, this news is very sad. AC/DC was absolutely huge in my circle of friends in the late 70's and one of my favorite bands ever. His contributions to the band and influence on rock guitar players cannot be understated. Swatting out clean-ish, huge power chords and riffs with his Gretsch, heavy guage strings, and Marshalls was a thing of beauty and pure rock awesomeness. A true originator. I'm going to watch "Let There Be Rock" in tribute to his brilliance.
Enjoy what, and whom, we have left...in a few years all of my/our 60's/70's rock musicians that we hold dear are going to fade into memory. Almost nothing else makes me feel as old as when musicians from my wonder years pass. Last night we did a mini tribute set for musicians that have recently passed and touched our band members (Tom Petty, Gord Downie, Kenny Shields) and am truly bummed to have another one to pay tribute to so soon.
Much respect Malcolm Young; you were a unique, creative, original talent and a giant in the hard rock world...and you'll be forever missed and remembered.