I try to talk to people and tell them we should, but most don’t want to spend the extra coin. I get that, piers aren’t cheap. Especially when you start getting into deeper water and having to use 30’ telephone poles. All the post I use are ground and water treated of course. The “salt water” treatment from Alfa lumber in Birmingham is what I try to get people to go with. It’s no 1 stuff that has been double treated pretty much. Probably the same as “ground and water” treatment. It’s good looking pine, which can be tough to come by now days. Feels like it’s full of lead though!