How did outgoing CEO Tim Cook take Apple from $350 billion to $4 trillion?

Today marks Tim Cook’s last day as Apple CEO and under his leadership, Apple’s market capitalisation surged from around $350 billion to nearly $4 trillion, while its stock rose almost 25-fold. The growth was driven by resilient iPhone demand, rapid expansion of services and global growth. Services including the App Store, Apple Music and Apple Pay became key growth engines.