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AI speeds easy code +40%, legacy monoliths +5% (or -5% in COBOL hell). Stanford’s 100k-dev study: average win = 15-20%, mostly from boilerplate. Faster shipping = 10× rework on bad ideas. Real bottlenecks? Killer ideas + 6-week A/B tests. Verdict: Use AI as turbo-intern; keep customer calls sacred.

Behind every great product feature is a great data pipeline. For PMs, this unseen foundation is no longer a technical detail—it's a core strategic asset.