I hope you are right. I still have doubts. Kachanov did not play well. Too early to call for me. His movement is still a bit suspect. His power and hand eye coordination is top notch.
"The question will be how much he will improve with this in-game strategy and shot selection"
This is the way. Do not rely solely on your massive power Joao. Don't choose the Alcaraz path
Maybe you are right. Otoh it also might show how good the first 120 players of the world are becoming, also mentally. They now believe they can beat a top 10 player on a given day