To be fair, the article is over 5 years old. The author seemed to be unfamiliar with tree-sitter (first appeared in 2018) and incorrectly assumed Atom used Tex

To be fair, the article is over 5 years old. The author seemed to be unfamiliar with tree-sitter (first appeared in 2018) and incorrectly assumed Atom used TextMate. Since then it's gotten much more popular and adopted by other editors.