I especially hate those tools that allow the marketing department to change the page, e.g. Adobe Target. They work client-side, making their changes after the h

I especially hate those tools that allow the marketing department to change the page, e.g. Adobe Target. They work client-side, making their changes after the html has loaded. They don’t work well with universal/isomorphic web apps, because they have no way of telling when hydration occurs, so they can really mess a page up if they do their filthy business too soon. But assuming that doesn’t happen, there’s still the matter of what they call “flicker”, which is a silly word that means the original content is visible initially, and then marketing’s changes kick in. To avoid so-called flicker, a page-hiding snippet is inserted into the page, making the entire page transparent until the tool modifies the page. These tools are often blocked by ad blockers, so the page will either remain blank, or will be restored by the page hiding snippet after a few seconds. You can make a blazingly fast website, and then marketing comes along and takes a big dump on it.