That's why I like the SteemTrail intiative. It's goal is to build communities around different topics. For example, I'm helping curate the #Gardening tag and the #Foraging tag. It's not necessarily in the Steemit culture, yet, to support a community, or connect with people around specific tags. But that's a natural evolution, like Facebook groups and Google+ communities. It's too hard to see who upvoted to build community around that. The comments are so much better. At the smaller scale of communities defined by specific tags, it should be a lot easier to build up a culture of commenting.