If you are in the US you may not know that people in the UK are losing their shit and have become very, very angry that Metallica is headlining the Glastonbury festival this year. In an editorial today The Guardian totally smacks them down.
Here's my favorite section:
"(T)he argument against Metallica seems to rest on the improbable belief that a band that has sold 120m albums has only niche appeal. You'd think the sales figures strongly suggested Metallica's fanbase may extend some way beyond diehard metalheads, but that hasn't stopped people carrying on as if Glastonbury had announced the headlining slot was to be filled by experimental grindcore band Cephalic Carnage."
So, really Metallica is not the thing that should not be.