I disagree: HN discussions are discussions, not blogs. The primary motivation for posting something here is to engage in a conversation. It's a very different form of writing as compared to blogging, for example. Running a blog is like running a 2nd business (in addition to your primary startup) - i.e. you have to spend a lot of time not just writing, but getting traction, promoting it, etc. Of course that would be a distraction for S&L, since building a search engine (not getting blog traction) was their goal.