If you’re only serving up heavyweight web apps, then this is probably true.

But Caddy also markets itself as an efficient static file webserver right on the home page:

> Caddy is both a flexible, efficient static file server and a powerful, scalable reverse proxy.

Perhaps the confusing part is the way that Caddy is marketed as “The Ultimate Server” when instead it’s designed to be a fast-enough reverse proxy for applications where performance doesn’t matter. There are many applications where performance really does matter. Static file serving is the most obvious example.