I am not sure about modernizing. I am all for developing core applications like mailman, but I fail to see great value in this piece of execution.

Post voting is bad for fact oriented discussions, popularity is a poor indicator for the value of a post. The user interface is cramped, and hides too much of valuable information I would expect to see instantly. Also, the looks are from previous decade (looks like sf.net clone to me) and not very aesthetic.

Sure, this might be a step forward nevertheless, but it is a really small one.