Why ATMs didn’t kill bank teller jobs, but the iPhone did

The popular parable that ATMs didn't kill bank teller jobs is only half the story. While ATMs reduced tellers per branch, they also lowered branch operating costs, enabling branch expansion and repurposing tellers as relationship bankers — a classic Jevons effect. The real displacement came from the iPhone, which enabled mobile banking and made physical branches largely obsolete, cutting US bank teller employment from 332,000 in 2010 to 164,000 by 2022. The key lesson: task automation within an existing paradigm rarely eliminates jobs due to frictions and complementarity, but paradigm replacement does. Applied to AI, simply slotting AI into human-shaped roles ('drop-in remote worker') will likely yield disappointing productivity gains and limited displacement. The real disruption will come when entirely new organizational paradigms are built around AI — analogous to how the iPhone didn't automate banking tasks but made the old banking paradigm irrelevant.