Most blogs consist of trivially addressable content (that is, everything has it's own URI, and the page is essentially "functional" -- the same URI will return

Most blogs consist of trivially addressable content (that is, everything has it's own URI, and the page is essentially "functional" -- the same URI will return the same content each time) and is thus trivially cacheable. Cloudflare or its many competitors will handle this extremely well. It's trickier when there is content on a page that has to be dynamically generated fresh (or nearly fresh) per page load. Most blogs never get into this territory (or have no reason to, at least) and most of us have experience with WordPress at the "look y'all, ima start a blog" level of sophistication, so there's this kneejerk toward feeling like this is total overkill. But it's not if you have the problems that owners of complex, interactive, heavily-trafficked WordPress sites have.