Besides what patio11 said, I don't know how much there is to discuss about that kind of stuff. You pay a ton of money, they handhold you to install/operate it, and over time you come to realize that it isn't as great as they promised. And if you criticize it in public the vendor may reduce your discount.
Largely as a function of demographics, HN tends to discuss technologies which are either big with the Cool Kids in Silicon Valley (e.g. Docker), the publicly-discussable inventions of AppAmaGooBookSoft (e.g. Kubernetes), and things that small tech-forward businesses worldwide would reasonably choose to adopt (e.g. PHP/MySQL).
The significant parts of technology which the userbase doesn't cover nearly so much are Big Freaking Enterprises (Oracle databases, SAP, etc) and technologies primarily used in non-tech-forward companies (e.g. some parts of the Microsoft stack).
If you think the view might be a little lopsided, my best advice is "be the change you want to see in it."