I worked at Apple for 6 years. Believe me, the teams are still very, very small and focused. If you have a small team, you don't need to worry so much about feature creep: you don't have time to work on the less vital stuff
Apple lets go of a number of things that Microsoft chases such as a religious concern for backwards compatibility, globalized features (not just localization but geo-specific features), and deep product extensibility with corresponding dev support. No judgment on those decisions but I'd argue that the size of MS teams isn't directly reflected in the product or features most folks consider as users of Microsoft's products and I wouldn't criticize MS based on those team sizes (as the author of this article does). Instead, I'd criticize the PMs or other managers inability to bring focus to those teams to clearly tackle the right problems at the right level of investment at the right time. It takes a lot of discipline to say "no."