This should absolutely exist. I'm curious if anyone has a particular reason not to make it the default?
I like and support the idea, but I'm not confident that it should be the default (Edit: Or am I?). I think threads around a week old still get comments fairly often (correct me if I'm wrong) and this might make it a bit harder for new posts to get exposure. I'm also not confident that it shouldn't be the default though, and I'm thinking of reasons it should as I type this.
1) People that visit the discussion page (for the first time and otherwise) will see active conversations. 2) Interesting things will stay at the top longer. 3) No need for new posts to...
The latest SMBC made me laugh a bit, so I thought I'd bring extra LessWrong attention to it.
I don't know if pointing out the subject of the comic in advance will make it more or less funny. Knowing that might be more data regarding that recent study claiming that spoilers don't actually spoil stuff...