I think we usually see "Show HN" threads for projects where the author expects it to grow (either a company or open source project). I take things like "vy" as

I think we usually see "Show HN" threads for projects where the author expects it to grow (either a company or open source project). I take things like "vy" as the author being proud of what they wrote and wanting to share it. No harm done. I don't see these posts as the author suggesting this is supposed to be the way forward, the new thing, etc. And to be honest, it's usually technically more interesting.