Eminem’s vault appears to have sprung another hole. There’s a reason the vault has become such a recurring metaphor. Implying impenetrable security, the term has been used to describe an artist’s hard drive – particularly one housing the glorious unreleased material. Yet with increased security comes an influx of adept safecrackers. Some camps, like Young Thug, Playboi Carti, Lil Uzi …