Why AI hasn't replaced human expertise—and what that means for your SaaS stack

Despite the rise of AI coding assistants, over 80% of developers still regularly visit Stack Overflow, and 75% turn to other humans when they don't trust AI-generated answers. Advanced technical questions on Stack Overflow have doubled since 2023, suggesting AI handles routine tasks while harder problems still require human expertise. Developers seek not just answers but the surrounding discourse — comments, edge cases, and contextual debate — which AI cannot replicate. Enterprise SaaS buyers are advised to evaluate AI tools on whether they acknowledge uncertainty, route hard questions to human experts, preserve context and discourse, and integrate with human knowledge communities rather than acting as standalone oracles.