Add responses and maybe.
Internet 1.5 was pretty nice, in hindsight.
As for displaying comments along with articles, feeds can reference other feeds, and in theory nothing stops an application or website from from making use of that.
BTW: it's possible to read Twitter in RSS reader too and make it a "slow web".
The future of the blogosphere remains bright.
And I'm visiting blog post pages first to check whether they have Disqus comments (which processed separately via Disqus API) and <blog_post_URL>/feed feeds.