Revenue Durability is Failing in the Age of AI

The article argues that revenue durability—the sustainability of a company's growth rate and margins—is becoming the critical metric for valuations, fundraising, and M&A outcomes, yet remains extremely difficult to predict in the AI era. It introduces Revenue Growth Endurance as a framework to measure deceleration (current year growth / prior year growth) and demonstrates how companies like Bill.com have experienced massive valuation collapses despite their absolute growth rates, while others like Palantir have strengthened their positions through sustained acceleration. The author emphasizes that understanding durability requires detailed waterfall analysis by cohort and retention metrics rather than aggregate figures, and warns that many high-flying AI companies will face similar durability failures.