After analyzing the three preceding possible explanations for Apple's R&D increase, we can conclude the only one that actually makes sense is the third choice: Apple is looking to pivot. The first two theories fail to hold much water since they do not mesh with Apple's functional organizational structure. Since each senior Apple executive is in charge of his or her domain across Apple's product line, it is not possible for Apple to simply keep expanding the product line without negative consequences. At a certain point, Apple's resources are just stretched too thin to be effective. Some have argued that Apple had experienced some of this resource strain towards the end of Apple Watch development. In reality, Apple is constantly suffering from this resource strain despite having $233 billion of cash and cash equivalents on the balance sheet.