Blockbuster was once the dominant movie rental company with over 6000 stores and $8.4 billion in annual revenue, but failed to adapt to changes in customer demand and new technologies like online streaming from Netflix and Redbox kiosks. Blockbuster's competitive advantages of its large store network became a liability as it faced high operating costs, inflexible brick-and-mortar model, and failure to transition to digital and online services, leading the once-dominant company to file for bankruptcy.