Several months to a couple years – this is, on average, how long Metallica writes a song. From retrieving a 5-star idea from their infamous Riff Bank, to crossing out the last checkbox on the recording progress wall table.
But there are outliers on both ends. There are songs born literally in days, such as Escape and Hardwired. And there’s one that took almost a decade to complete: All Nightmare Long. It perfectly shows how Metallica’s transitioned from St Anger to Death Magnetic.