Grocery chain Haggen went bankrupt in 2015, but one former store in Las Vegas is still empty and boarded up. The store, in Boca Park, seems like a choice spot for retailers. It’s near affluent communities and a busy intersection. But big-box retail is on shakier footing, and there’s no shortage of competition nearby. “I don’t know specifically what the problem is. I’m befuddled by why it’s taken so long.” — Dan Adamson, founder of brokerage firm ROI Commercial Real Estate