This note contains four papers for "historical perspective"... which would usually mean "no longer directly relevant", although I'm not sure that's really what the author means.

You might be looking for the author's "Understanding Large Language Models" post [1] instead.

Misspelling "Attention is All Your Need" twice in one paragraph makes for a rough start to the linked post.

[1] https://magazine.sebastianraschka.com/p/understanding-large-...