Thank gods I'm not the only one noticing this! When humans write impenetrable prose, most of the time it will be too verbose. Big words, too many words, long sentences, being parenthetical, that kind of thing. LLMs, however, make their writing hard to understand by being too terse in a peculiar way, where "the caveman" is also "the mad scientist". I've noticed both Claude and Codex often invent their own jargon to explain what the code does and what their fixes are about. It's irritating, but I thought maybe I was getting senile and could not understand a simple sentence.