There's a very simple reason why the resurgent Microsoft is threatening to overtake the slumping App

Microsoft and Apple are jockeying for position as the world's most valuable tech company.  It's easy to chalk this up to Apple's weakness – but don't sleep on the fact that it's also because of Microsoft's strength.  Where Apple has to deal with fickle consumers in a volatile market, Microsoft's focus on enterprise software and services is less exciting, but could be more durable and stable.  Plus, Apple has to deal with the possibility that the iPhone will face tariffs from the Trump...