But the sites that are slow or performance sensitive often aren't just static sites. If it's more than just a simple CMS to you, you need to be enough of a Word

But the sites that are slow or performance sensitive often aren't just static sites. If it's more than just a simple CMS to you, you need to be enough of a WordPress expert that you probably don't need WordPress in the first place (or you're just using it for the themes or plugins). Weird WP performance cliffs are hard to avoid for dynamic content and "correctly configuring" either means rolling a custom solution or getting neck deep in your infra—both of which smell a lot more like engineering than not.