Claude Code Overtakes GitHub Copilot: What JetBrains' Survey of 15,000 Developers Says About AI Coding Agents in 2026

80% of developers find AI coding more addictive than helpful

80% of developers find AI addictive (43% work involuntarily after-hours, 51% risk burnout). Agents create 'verification debt'—validating code costs time that can erase productivity gains, forcing tech leaders to balance speed against developer sustainability.