That's ridiculously big quantity of data to serve a seldomly updated blog just because the client doesn't want (or know how, or think about) to implement an eas

That's ridiculously big quantity of data to serve a seldomly updated blog just because the client doesn't want (or know how, or think about) to implement an easy and old http method. Imagine the petabytes of data transferred through the internet saved if a couple RSS clients added that method.