Cronusfit has talked about overdoing the ruck thing before. They train a lot of Ranger Regiment and ranger school candidates, so they see a lot of it. They have said it’s one those essential things for certain endeavors that you have to do “enough” but then don’t do more than that. The trick is finding out how much that it is for you. I find value doing up to one a week. And not especially heavy. More than once a week, or more than 40ish pounds, I start to see more issues.
I nearly pushed too much this season. Rucks, heavy pack and dumbell workouts (like the MTN Tough pack test) leg blasters, step ups, and still squatting and deadlifting relatively heavy on top of all that. Kind of tweaked a hamstring shortly before my hunt, so laid off all of it the last week before I left.
Got through this season fine, but as I get older I’m definitely liking what the OP said. Hills are great because they add resistance, while actually slowing you down, therefore reducing impact.