A lot of the things he mentions do exist in different places. For example, the parens https://www.emacswiki.org/emacs/RainbowDelimiters https://www.emacswiki.or

A lot of the things he mentions do exist in different places. For example, the parens https://www.emacswiki.org/emacs/RainbowDelimiters https://www.emacswiki.org/emacs/RainbowDelimiters