> you simply include everything in the markup that might need to be there, and the programmer removes whatever is not necessary

I realize you may not be cosigning on everything in the article you're quoting, but this is the author's first suggestion to an alternative to template languages.

I work on an SPA that was built like this. The index.html is over 10k lines long. It contains almost every single piece of the UI. Templating libraries and languages aren't perfect but they offer a better separation of concerns than just "dump it all in one file and write some imperative dom fiddling code to add different states"