This definitely moving away from keying kicking team players, and looking for threats in the various lanes or zones. Around 2003, we realized that watching A players was a waste of time. Very unusual for them to commit a foul on a blocker. They might run out of bounds, but that’s even unusual.
It’s the receiving team players that are going to hold, BBW, BIB, etc. Look for the receiving team player in your lane/zone that is a threat to foul.