Why LLMs Can Never Be "Execution Entities" — A Fundamental Paradigm Breakdown

LLMs are probabilistic text generators, not deterministic execution systems, and treating them as autonomous execution engines in production leads to consistent failures including hallucinations, broken state management, and unreliable error recovery. The article identifies six irreversible engineering flaws—such as lack of real state, persistent memory, and state-locking mechanisms—that no amount of plugins or prompt engineering can fix. It argues for a clear architectural separation between LLMs (for reasoning/generation) and traditional stateful execution systems (for reliable, auditable task completion).