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Over the years, critics argue that U2's music has lost its edge. From the lackluster releases of the mid-'90s, such as Zooropa and Pop, to their more recent outings like No Line on the Horizon, audiences have found the band's output increasingly uninspired. Songs such as "Get On Your Boots" and "Vertigo" have been described as painful missteps, demonstrating a sharp contrast to their earlier impressive catalog.