I don't disagree with you that contemporary technical writing, editing and technical blogs were converging to what is known as llm style even before provisioning of llms. In the end, llm were trained on these recent writing and recent blogs and this is why similarity exists. Still one can find some technical writing that stands aside and has very distinct style without compromising on clarity/digestability, i.e. Martin Fowler, Armin Ronacher, Michell Hashimoto write very differently from each other and Claude, but their content is always sharp and very much digestable. Take this paragraph by Claude

> Scientific Linux gave the scientific community its own implementation of a RHEL-compatible computing environment. More importantly, it kept alive the people, processes, infrastructure, and institutional knowledge needed to maintain one.

> That capability had option value. You might not need to exercise the option this year, or even this decade. It becomes valuable when the assumptions underneath your primary platform change. Those assumptions changed surprisingly quickly.

Can't imagine this lengthy style with paraphrases coming from Hashimoto or Fowler. Yes, it can appear not only in llm writing, but also in some heavily edited o'reilly book, sure, but I miss the times when tech blogs and o'reilly books were different.