He did explain that at least once here. Someone brought it up about six months ago when they updated to the new Altair. Here is a related discussion from around

He did explain that at least once here. Someone brought it up about six months ago when they updated to the new Altair. Here is a related discussion from around that time. Sorry I couldn't find the one from PG. https://news.ycombinator.com/item?id=5239673 https://news.ycombinator.com/item?id=5239673 IIRC HN runs off a flat file, and doesn't use SQL, or anything else fancy simply because it isn't needed, and or because it adds unneeded complexity.