you don't need a CDN or even a DNS to host your blog (though most probably you'd use them). you will still be at the mercy of registries to have an IP address o

you don't need a CDN or even a DNS to host your blog (though most probably you'd use them). you will still be at the mercy of registries to have an IP address other people can find, but I think practically speaking it is not far fetched to consider this a "distributed system" (for most use-cases anyways).