RGESN et marché public

I usually do not originate posts. As a public service I thought I would post a few studies, most published and others just articulated on the web, about the effectiveness of AI.

Ford rehires humans after finding AI can't deliver quality
https://lnkd.in/eCi7wyE9, The BBC, Jun 2026

"Corporate leaders are starting to question whether soaring AI spending is delivering meaningful returns," https://lnkd.in/exb3VncU

Uber's COO says it's getting harder to justify the money spent on AI tokenmaxxing. https://lnkd.in/giMSMnYC, Business Insider.

Microsoft reports are exposing AI’s real cost problem: Using the tech is more expensive than paying human employees, https://lnkd.in/g3cq95pv, Fortune magazine.

Use of ChatGPT reduces brain activity by up to 55% in college essay composition: https://lnkd.in/eHfTNcwX, Cornell University, Jun 2025.

AI dilutes your ability to retain and recall information. ChatGPT: The cognitive effects on learning and memory, https://lnkd.in/e95ZCR2b, Chinese researchers

Doctors' use of AI erodes their own ability to diagnose tumours. "Endoscopist deskilling risk after exposure to artificial intelligence in colonoscopy: a multicentre, observational study."
https://lnkd.in/egGaQgAT. The Lancet digest of medical journal publications.

AI dilutes critical thinking: "AI Tools in Society: Impacts on Cognitive Offloading and the Future of Critical Thinking." https://lnkd.in/ePjS3UZG, Sept. 2025, SBS.

Devs predicted they would be 24% better but in fact were 19% worse: the METR study. https://lnkd.in/e-5SGtwW

AI prompters may be productive, but at the cost of quality: maintenance and repair costs more than eat the advantages. Scientific American. https://lnkd.in/eHsShjzv.

AI-generated "workslop" is measurably destroying productivity. Harvard Business Review. https://lnkd.in/eUyx5t5K

Microsoft found that Copilot 1. made developers feel they were getting more done, 2. gave little to no productivity gain, and 3. increased bugs. https://lnkd.in/ec6ZqpJ8. The BBC, June 2026

Bain & Company research finds AI causes a 10% to 15% hit. https://lnkd.in/e3V87F3i

For the layperson: AI chatbots could be making you stupider. https://lnkd.in/eEVFqJi2, 20 Apr 2026. BBC News.

Cornell University. Scientific American. Harvard Business Review. Microsoft. So many of the positive reports come from sources we should view as untrustworthy, given the posters' prospects of benefiting if AI actually helps.

Felienne Hermans is full professor of Computer Science Education at the Vrije Universiteit Amsterdam.

Felienne is the author of the 2021 book The Programmer's Brain, a very readable and highly insightful introduction to the cognitive science behind how human brains learn programming. Why is programming hard to learn, and what can we do about that, both as learners and teachers? We recommended this for everyone, but it is particularly useful for those who just started to learn programming, as well as people who try to teach others.

Felienne’s most recent project is Hedy, a programming language aimed at beginners – including children – and that realises many of the insights from The programmer’s brain about why programming is hard to learn. Hedy is a “real” programming language in that it is unapologetically text-based, but the language design is gradual, progressing from an extremely lenient but incomplete language to a nontrivial subset of Python.

The language is under active development and constantly exposed to feedback from children who actually learn programming. We find this brilliant and are particularly impressed by the possibility of Hedy to teach some programming to everyone, rather than all programming to some people.