Yes, those exist and are very much used (and replaced as a maintenance item). Unfortunately does not eliminate the slow accumulative injury of going over rough

Yes, those exist and are very much used (and replaced as a maintenance item). Unfortunately does not eliminate the slow accumulative injury of going over rough and tilted ground for decades. It seems like more of an issue here in the willamette valley of Oregon than it was in southwest kansas. I think the steep hills limit what is reasonable for suspension to counter with spines held at an off angle for long periods.