Dynamic pages do have some overhead, as discussed in the article. But it is still vastly superior to running the site in the browser. Because the generation is

Dynamic pages do have some overhead, as discussed in the article. But it is still vastly superior to running the site in the browser. Because the generation is done once, and it is darn quick. After that all of the numerous advantages of a static page still applies from a users perspective. The resource use is many orders of magnitude less and the page is much more responsive. The user experience is vastly superior, we haven't cared about that in the last decade.