Who knows. The page is down and 90% of is never got to read the article but the title sounds appealing.
Well, just position:fixed; bottom:0; your footer and make sure your scrollY - element.height or whatever has an offset to account for the footer.
Pity the site is down. Can’t read the article. It could be about conniving cheese merchants and their never ending battle for umami supremacy ffs, how should I know.