There are still gamblers that does that. They won't stop until they've won 100% of their bankroll for which is hard to reach to be honest.
Sometimes it happens but it usually don't and that's why it is best for everyone to check it out before doing so because not everyone will be hitting 100% of bankroll if that's the condition before withdrawing.
Of course, many players think so, but these are just conventions and setting up some goals that will be achieved as luck will have it. Players need to think more often about strategies, and not about how to quickly win and run away with the winnings. Even if he gets lucky and makes 100% and leaves, he is still almost guaranteed to return sooner or later to try to do it again. And if the player starts losing smoothly, this can make him tilt and lose the entire amount. This is a classic example of many players, but many of them think that they are different from others in some way, although in fact this happens very often.
I still prefer to withdraw a small part of the winnings always, with the exception of very small winnings.
That should be the preference on how it would be. We have to withdraw small amount or part of our winnings. And that's the reason why some are missing themselves profits when they already have it, they are not content to get into small amounts because they're aiming higher. There is nothing wrong with that but knowing how gambling works, that little profit might be gone too quickly if not taken care of.