I’ve been working in customer support for a premium caching plugin (WP Rocket) for several years now. I’ve seen a lot of websites and helped a lot of customers. Every day, many times a day, in our ticket queue, we receive some version of this question:
“Why isn’t my site faster?”
Depending on the site there may be many answers to this question. However the answer is almost never anything to do with caching.
A caching plugin, nor any one optimization technique can fix all performance issues. In fact, as site owners we can be our own worst enemy when it comes to speed, due to all the content we’ve put on our pages.