For the past five-plus decades, Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) CEO Warren Buffett has been in a class of his own on the investing front. Although Buffett hasn't exactly spilled the beans on why Goldman Sachs and Travelers are getting the boot, my personal belief is that a period of low inflation and weak economic growth to follow may be bad news for both companies. In recent quarters, Apple has had little issue delivering double-digit growth in wearables and services, which are generally higher-margin categories than commoditized products like smartphones and tablets.