<< Why? The current software already does this, no extra configuration needed!  >>
I know that, thats why I said you can always change it to show most recent posts (in each thread) at the top.  It does require some configuration, albeit a minimal amount.
<< But here, it would not be good, since you'd have to scroll all through a page to find new replies, instead of having them appear at the bottom of the thread.  >>
You wouldnt have to scroll all the way through a page, you could have it post the most recent at the top of the thread.  It would also be cool to introduce (along with the newsgroup style) a drop menu for the individual replies, just like in newsgroups.  Therefore, the default could have all those individual replies hidden and then you would still see it as Anandtech has always been, but if you wanted to see/post an individual response, you still could.