I meant GCD. The LCD between people on HN is arguably their personhood - but that's not useful, since it's true for every online community. The GCD of HN, on the other hand, has to do with a shared love of problem solving, particularly in fair contests. The website of a library, as opposed to the library itself, is an expression of "a solution", which we can all enjoy (and comment on), even if we don't use it in our work. Therefore website exposition speaks to the GCD of HN members.

I was wondering why he was comparing JS to Grand Central Dispatch myself.