Upvotes & downvotes are used in a specific way here. They aren't meant to show agreement or support, but rather to recognise that your comment holds some interesting value (or lack thereof) for other readers. A quick comment of excitement is low value to other readers, regardless of it being an authentic feeling. Hope that clarifies.
Probably downvoted because - with respect - your comment didn't really add anything interesting or insightful to the discourse here.
For the future it might be more interesting to state why are you excited about this? What's the reason that this is exciting? Are there interesting things about this that other readers might not have considered or that wasn't covered in the article?
Thoughtful and interesting comments that add to the article with extra content/context/objections/etc are usually what people want to see in the comments section. HN has a really wide and varied readership and there often are a lot of readers who have a lot of experience/qualifications or are experts/semi-experts in a subject so the comments are often extremely insightful and often provide another angle to the story. Probably best to save short comments about how you are feeling for twitter.
Thanks Matt, very appreciated. On the other hand I somewhat feel like if I had put forth my opinion on why I was excited, I would have been even more downvoted. I suppose no comment at all is really what they want.
