The Four Horsemen of the LLM Apocalypse — Technical Analysis of Fundamental LLM Failure Modes

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A technical blog post gaining traction on Hacker News (36 points) identifies four fundamental failure modes in current LLM architectures that define the technology's practical limitations. The analysis provides a framework for builders designing agentic systems to understand where LLMs systematically fail in production, contrasting marketing claims with observed behavior patterns. Relevant for anyone building on top of LLMs who needs to design around known failure modes.