Ask HN: Is It Actually Possible to Run Multiple Coding Sessions in Parallel? — Consensus: 3-5 Max, Git Worktrees Essential

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An 11-point, 16-comment Ask HN thread maps the practical limits of parallel AI coding sessions. Community consensus: most developers max out at 3-5 concurrent sessions before cognitive overhead dominates. Git worktrees emerged as the consensus infrastructure solution. Key insight from one practitioner: 'human cognitive limits are the real bottleneck' — even with perfect tooling. Advanced techniques include using multiple AI models where one reviews the other's work, and tools like Coasts for full runtime isolation per worktree.