[posguy]

Depends if Apple really feels they can run a backoffice banking arm effectively and cheaper than a partner that is already at scale.

Underwriting credit & customer risk, handling edge cases, maintaining relationships with ATM networks, card networks and ensuring compliance with state and federal banking rules is quite an undertaking.

Goldman Sachs did not have scale like Chase, Capital One and others to create a diversified portfolio of clients, limiting their ability to hedge against the risks of a single platform or two dominating their involvement in this market. One bad software update by Apple could flood their support queues, and they can't afford to keep significant staff on hand to keep wait times below an hour (unlike a larger company, who is already staffed up to serve their non-Apple customers).