My parents had white 4" Ramm for years. My farm had portions of white 4" Ramm when we bought it. All of it was still useable after 15 years but the white was so mildewed it looked nasty. (the farms are in Illinois and Alabama)
My parents have since replaced their fence. And we also took down all of the Ramm fence and put up 5" Centaur flex rail. We had multiple reasons for taking it down but the biggest reason was it was only about 42" tall and I did not feel safe turning out the horses in it. The Centaur fence has been up for 2 years now and the only thing we have had to do with it is cut 2 trees off it. It is seriously zero maintenance. The trees didn’t damage it when they fell on it, it was a simple loosen the bracket and straighten out the fence and boom done.
We chose Centaur because it’s manufactured 45 minutes from us and we could pick it up from the warehouse and not have to pay freight. That saved us $$ money. We went with the regular flex rail and added the coated hot wire instead of installing the hot-rail. It was cheaper for us to do it that way. The Centaur fence really isn’t very expensive, it’s all of the accessories that make it so high. And the hot rail brackets are expensive.
See the 2 pictures linked to see how we have the fence set up. It’s 4 rails with 3 coated hot wires. Which is entirely overkill for the horses, they would be fine with 1 hot wire but we also have longhorn cows and they can and will go through the boards. So that is why the coated hot wire is positioned in between the rails.
Or you can see this picture from before we added the coated hot wire.