My wrist hangs straight down at address and remains straight throughout the stroke, unless I intentionally unlock it for a particular type of effect, and I recommend the same to players. One example of a wrist release during the stroke would be a hard break shot. Another would be when the cb is close to the ob and you need speed for it to travel a long distance. But mostly, there's no reason to move your wrist during most of your strokes. It at least 90 percent of your shot, your arm swing speed is more than sufficient to get the job done.
Some players like CJ like to have their hand locked in more of a follow-through type position from address through the entire stroke. I don't know what that accomplishes other than curtailing the follow-through after impact. I think that locking forward or back are habits more than anything.