📚 Sources

• Gartner — Predicts Over 40% of Agentic AI Projects Will Be Canceled by End of 2027 (June 25, 2025); forecast “33% of enterprise software / agentic AI by 2028, up from < 1% in 2024.”
• Wikipedia / Britannica — MYCIN (Stanford, E. Shortliffe, ~500-600 rules, performance comparable to specialists, never clinically deployed).
• Wikipedia — AI winter & History of artificial intelligence (Lighthill Report 1973; 1st winter 1974-1980; expert-systems boom > $1B in 1986; 2nd winter 1987-1993).
• Krizhevsky, Sutskever, Hinton — ImageNet Classification with Deep CNNs (AlexNet, 2012).
• Vaswani et al. — Attention Is All You Need (Transformer, 2017).
• Product documentation and communications from the vendors OpenAI, Anthropic, Google (state of mid-2026) for the engine names. ⚠️ Evolving versions (every 2-3 months); the vendor labs themselves stay stable.