I’m confused, I was able to see 10 pages each exposing a tricky SQL request with modern SQL features.

Maybe it’s been added in the face or HN grumpyness? ( tbh : I would not have give anything without those extracts, so your comments in on point )

The value proposition was clear to me from the landing page. Maybe it wasn't to you. I could read enough of it to say "hey, this sounds interesting, I wouldn't mind hearing more from this person."

Also, SQL databases are one of my favorite tech topics. Postgres, especially, has tons of cool features (example: lateral joins.)