Quote - No. Any post that has a new reply gets bummed to the top. So many of the new threads get dropped

But when they get replied to again, they go to the top of the list again... as it should be.

Just like if you find a thread from back in 2000 and make a post, that thread then goes to the top of the list because there is a new post in it. 

If it was "sort by date of post", you would have to look through dozens of pages, or have a bookmark to find that thread to read that new post.
Sort by Last Reply = Any thread that gets posted in gets move to the top of the list regardless of when the thread was created.

Sort by Post Date = Leaves the thread in it's original place regardless of whether there is a new post in it or not.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi