It isn't the 1990s anymore. The vast majority of comments on blogs will be spam, bots or, in the extreme rare case of an actual human reader, raving lunatics. The chance of an actual human being reading your blog and leaving a sincere comment in good faith is so low that you can safely assume it will never happen.
I know spam is a ver big deal, but that wasn’t my experience. I wasn’t around in the 90s so I don’t know what it used to be like. But just a little over half a decade ago the blogs I used to visit still had people interacting with each other and it was common for posts to have meaningful conversations. I miss that a lot.