Apple's top job comes with almost unrivaled power and money, but it comes with plenty of baggage, too.

The transition has been expected for some time and ends one of the longer and more impactful runs a CEO has had at any company. Cook had inherited a company that many industry watchers and enthusiasts struggled to separate from its famed founder. What he leaves behind is a $4 trillion business with annual revenue that has more than quadrupled on his watch.

A lot of AI startups exist partly because the foundation models haven't expanded into their category yet. As many jokingly acknowledge, that won't last forever.

For most of its life, Airwallex and Stripe have mostly operated in different geographies, selling to different buyers. That's changing.