Yeah, it's really disappointing. According to Dr Hladik, they aren't fully ignoring the pond issue, but it's not a priority item for them right now. Rivers, he said, are not planned at all. It's understandable given everything they're working on, but it is holding back progress for some terrain developers. I hope that Arma gets a proper water implementation one day. Maybe we'll get lucky and finally get it with the expansion for Arma 5 in 2022.