@ALPJr You are exactly right.
Honestly, without Suyderhoud's contributions during the 90's and 2000's, I do not think very many people would be on the right track.
Today, it seems like a majority of skiers out there (and most on this forum) have a sense that standing on the ski "correctly", means the skier has to make a dynamic effort to keep their body moving slightly "ahead" of their feet. Now when we say mass "ahead" of the feet, what we really mean is mass closer to the wakes, than the feet, on the acceleration phase. The frame of reference matters, and in this line of thinking, the frame of reference is the Skier+Boat system... One way to put this, is that the skier should be trying to actively "Fall" towards the wake - as the skier begins accelerating toward the wakes, if they make a "dynamic" effort to keep their mass "ahead" of their feet, they gain water speed under their ski...which provides more support, which allows them to add "LEAN", which creates more rope AND ski load,...BUT if they keep their mass moving ahead of their feet, that ski load (hydraulic force, as some call it, felt through the feet) contributes to acceleration towards centerline, which instantaneously reduces rope load slightly....which increases water speed under the ski,...which then allows for a bit more lean, and the cycle repeats itself up to centerline....where it approaches a limit, of sorts.
The Adam's have discussed this very same thing, from a different frame of reference: the Skier's perspective. From that frame of reference, the goal is to achieve (and actively maintain) a stance Perpendicular to the ski. Either way, the same thing is being described.
However, without Suyderhoud breaking through in the 90's (as you've mentioned) I really don't think any of us would've figured this out...OR if so, it would've taken much longer to get to the level of collective understanding we are at currently.