It'd be an interesting blog post topic to look at how AWS:Invent (or I/O, or F8, etc) product threads on HN compare to actual product impact. I remember Rekognition getting decent discussion 2 years ago [0], but not along the angles or magnitude of how Rekognition is usually discussed in recent months. OTOH, other things I've been interested in as a data geek, I've barely heard of since reading about them on HN -- e.g. Athena [1]

[0] https://news.ycombinator.com/item?id=13072956

[1] https://news.ycombinator.com/item?id=13072245