I was misunderstood. I mean the "posting capability". I open the most popular HackerNews thread and read the comments on commute but I don't care posting a comment because I know I'm offline.
Ah, well imagine you are writing a novel of a reply to someone and it gets lost when you exit out of the app. Wouldn't it be nice to save the form data so when you're on Wifi you can reply? That must be the motivation.