Just as telling he went from ~80% of CBA for the first 6 rounds, when he averaged 141, to ~70% the rest of the way where he averaged 113. (I removed the game that Jackson missed where he rucked 96% and scored 117).
He absolutely could still be the top ruck but I do expect the Jackson development trend to continue and, if anything, would expect it to increase.
It's genuinely impressive the lack of definition and muscle on the kid at this point! Even Tim English might be able to push him around
Looks like he's got a few years in a gym and steaks for breakfast, lunch and tea ahead of him!