"Artists rework their back catalogues for different reasons. For Taylor Swift, it's been a way to escape contractual constraints. For Kate Bush, on 2011's Director's Cut, it was an exercise in correcting niggling production and arrangement choices of the past. For U2, it sounds like a kind of liberation. If their creative missteps in the past two decades have generally been caused by their twin determinations to keep up with modern pop and relentlessly pursue music that works in stadia, then here they've cut themselves free from all of that. Ultimately, it may be a watershed moment. By stripping it all back down, in some ways, they're bigger"