This is partly the reason why Berkshire Hathaway is now the largest owner of Apple stock. They believe that Apple has a 'moat' they can use to defend their posi

This is partly the reason why Berkshire Hathaway is now the largest owner of Apple stock. They believe that Apple has a 'moat' they can use to defend their position. It think they are correct. What can always happen is that they fail to see change coming and drop the ball like Nokia did. They had incredible moat in multiple areas: manufacturing, supply chain, technology and scale. They were able to produce high quality phones with the same cost as cheap brands and pocketed the difference in profits but they didn't see the revolution coming. The future of Apple's growth is pivot to services and rent from platform.