This document discusses how long websites typically last before needing to be redesigned or rebuilt. It begins by explaining that technology does not last forever and websites, being technological platforms, are subject to becoming outdated as expectations and capabilities change. It then discusses five key factors that influence when a site may need an overhaul: technological changes, design shifts, content updates, changing user expectations, and evolving devices. The document also explores the benefits of a full rebuild versus a lighter "realignment". Overall, it argues that websites must be continually evolved and optimized to avoid becoming obsolete.