My guess is that this was done to prevent trolls from going through someone's entire comment history and downmodding everything. (Not that this is impossible to do currently, but it's tougher than it would be if a user's comments were paginated out to infinity).

Or it could just be a feature that was left out for lack of time/motivation.

I enthusiastically agree. I don't have time to keep a blog. If I did, I'd feel obligated to add to it and that's the last thing I need. The great thing about HN is that I just comment spontaneously when I'm moved to do so, and on several occasions this has led me to express thoughts that have been kicking around in my head for a long time, but which I never wrote down before. It would be nice to have access to the history of this.

It would be even more useful to have the full history of other users' comments too. One of my favorite things to do on this site is run across an intelligent remark and then look back to see what else that person has had to say.

Thanks!

Can you do type=comment or something like that?