Actually it's not. Go! is a totally different language.

But more on topic. This has happened ever since I first started frequenting this site in 2009 (2008?). People upvote links that interest them almost without regard to whether it's already on the frontpage. Personally, I like it. When the first article on topic A gets posted and you get 300 comments, it becomes unwieldy to join in the conversation. The other discussions tend to focus on other issues with topic A or are simply easier to join in on since there are fewer comments overall.

I once saw the entire HN homepage consist of articles about a single topic.

Can you gess which one?

The legendary Erlang infestation of 09..

https://news.ycombinator.com/item?id=512280

No one expects an Erlang infestation.

Are you going to be at the Erlang User Conference next month? I will enjoy putting messages in your inbox while you fail fast attempting to walk and drink at the same time.

http://www.erlang-factory.com/conference/ErlangUserConferenc...

Aaron Swartz was the same. Almost the entire page was filled with articles offering different perspectives, from Lessig, Cory Doctorow, TarenSK, Quinn Norton, NYT..

Incredibly touching, and sad.

I saw this with Aaron Swartz's death.

Steve Jobs' death.

Bingo!