Conor Oberst was only on the third song of “I’m Wide Awake, It’s Morning” at the Hollywood Bowl on Saturday evening when he came to reflect on how the world has — or, more pointedly, hasn’t — changed in the 21 years since the album’s release. “It’s this much later and we’re in a war in the Middle East for the sake of rich people getting richer,” he told the audience as he cued up “Old Soul Song (for the New World Order),” a tune about attending a rally or protest in the Bush era, possibly about