The Nov 11 Stack Overflow blog post doesn't include the comments section. I think that this is a bug, since all other posts do have this section, and I don't think that the Stack Overflow team has suddenly decided to disallow commenting for new posts.
Comments are allowed or disallowed on blog posts on a case-by-case basis. Based on our past experience with posts on this topic, we've decided to close comments on that particular blog post as a precaution. We don't want to prohibit discussion about the post and its content, but we do want to make sure we can have those discussions in an environment like this one on meta, where there are better controls for a reasonable conversation on a controversial topic.