My sister's fence has seen better days so when her neighbor asked her if she wanted to redo the fence, it was a delightful, "Yes!" Here's the before picture. There's an instant "doggy door" at the bottom.
A close up reveals a fence that looks even worse.
This eight foot, board on board with cap fence reaches the the roof and moving the gate to line up with the neighbor next door adds greater privacy for the bedrooms.
Hopefully, I still have many more years before I have to think about replacing my fence, but this is certainly what I was thinking of for myself.