I can try to explain for people not playing Go the most important thing that changed:
The AI popularized a move that has been known since ages, but wasn't used by strong humans much because it was considered a mistake (the early 33 invasion).
The thing with this move is: It gives you a small advantage very early in the game, but gives your opponent a superior fighting position in exchange. This fighting position was considered better. Not early on, but in later stages of the game it oughtweights the small advantage taken early.
Then came AI and it found out, given enough fighting power, it can mostly cancel that later game advantage.
So the new move is actually a good one, but only if you have very strong fighting skills. AI has this, some very strong players as well.
But for the rest of us, the pre AI strategy is often better because we can't handle the complexity.
It is common to see casual players copying the AI style and digging their own grave while doing so.
The AI popularized a move that has been known since ages, but wasn't used by strong humans much because it was considered a mistake (the early 33 invasion).
The thing with this move is: It gives you a small advantage very early in the game, but gives your opponent a superior fighting position in exchange. This fighting position was considered better. Not early on, but in later stages of the game it oughtweights the small advantage taken early.
Then came AI and it found out, given enough fighting power, it can mostly cancel that later game advantage.
So the new move is actually a good one, but only if you have very strong fighting skills. AI has this, some very strong players as well.
But for the rest of us, the pre AI strategy is often better because we can't handle the complexity.
It is common to see casual players copying the AI style and digging their own grave while doing so.