AI made coders slower — But strangely happier

A new study by AI research group METR gave pro developers AI tools like Cursor… and it actually slowed them down by 19%.

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- They expected a 20% speed boost — got the opposite

- AI suggestions were “almost right” but took longer to fix than coding from scratch

- Yet devs kept using it… because it felt easier and less stressful

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The takeaway? AI won’t replace your skills — but it might make the job feel less painful.