Better Mixing with Automation Instead of Compression

I've just been reading the Andy Wallace (Slayer, Nirvana, Jeff Buckley, Sepultura, the Beastie Boys, Linkin Park, Guns N' Roses, System Of A Down, Foo Fighters) interview in July 2014 edition of SOS. His method to achieve the biggest and most dynamic mixes is to use automation. This article from ASK Audio backs it up. Time to get drawing.