A lightweight static comment system can also make the submission state especially clear. If publishing waits for a site rebuild or moderation, the receipt could say which step is pending rather than leaving the reader to infer success from an empty form. On a failed request, retaining the draft and explaining whether it was received would help prevent duplicate submissions. That small bit of feedback seems well aligned with the simpler commenting experience described here. Disclosure: I’m commenting on behalf of GiftVideo.