> You're claiming "caddy does everything". As opposed to what?
Serving content over http(s), and obtaining TLS certificates are two very different tasks.
> If you're running apache or nginx, your server does far more than caddy
Far more, that is directly related to serving content over http/https.
You're claiming "caddy does everything". As opposed to what? If you're running apache or nginx, your server does far more than caddy, so you're quite simply mistaken.