It clearly notes that it's "a refresher", does not claim that it's novel research, and extensively links to the reference documents. It is, essentially, a review article (https://en.wikipedia.org/wiki/Review_article). And there's absolutely nothing wrong with that.

Hell, the author could probably have called it a primer and I think it'd have been fair.

Dunno man, sometimes I write blog posts for my own benefit, to document my knowledge and understanding of something. I could put it in a private note, but I can also put it in my blog and who knows, maybe someone else can benefit from it - even if it’s nothing you couldn’t google research yourself or god forbid, ask an LLM to summarize for you.

No need to be mean and assume the worst possible purpose :)

I’m sorry you didn’t get anything out of it. I wasn’t operating at the edge of caching knowledge, just a person refreshing and clarifying for themselves how caching works. Some things were new to me, and after spending so much time with the RFC, I just thought others may benefit or, more selfishly, would point out errors or ways to make it better.

I mean, do those <meta> tags really suggest someone who’s into SEO? Call me stale but what I really want is validation :-)