It's this sort of stuff that makes it so good. Nothing like eavesdropping on a highly technical conversation in an esoteric field. Love it.
The guidelines are guidelines. We all work to interpret them. HN themselves in introducing the guidelines says that "empty" comments can be okay if they're positive, which I feel this was.
> The test for substance is a lot like it is for links. Does your comment teach us anything? There are two ways to do that: by pointing out some consideration that hadn't previously been mentioned, and by giving more information about the topic, perhaps from personal experience. Whereas comments like "lol" or "That's the dumbest thing I ever heard" teach us nothing.
> Empty comments can be ok if they're positive. There's nothing wrong with submitting a comment saying just "Thanks." What we especially discourage are comments that are empty and negative—comments that are mere name-calling.
The statement dates to 2014.