clamp() with relative units for application in font-sizing

what do you think about this article: https://css-tricks.com/linearly-scale-font-size-with-css-clamp-based-on-the-viewport/

I think you can add this to responsive design

I am not that experienced and if you are free I appreciate if you can share your input if the article is good to use or there are better ways, because reading responsive design>relative units I think this is easier to do. Thank you in advance!