The LLM only "knows" what's in its training corpus so it's output quality is going to be comparatively crappy on private custom frameworks with only a small cod

The LLM only "knows" what's in its training corpus so it's output quality is going to be comparatively crappy on private custom frameworks with only a small codebase to train on (relative to the entire corpus). Companies with private frameworks will therefore lose out. If anything, the opposite is going to happen: LLMs will cause consolidation and software evolution to grind to a halt. Coders are going to gravitate to libraries and frameworks the LLM generates the best outputs for, leaving a few big winners and the rest going extinct. New language features and new frameworks will be slow to enter general usage because of the chicken and egg problem: there will be little or code in the LLM training corpus that uses them idiomatically until some humans write enough quality code using the new features/frameworks that can be absorbed into the corpus to meaningfully affect its output.