Indeed. That it was called out in dialog signals some level of importance. If they hadn't it would be a non-issue.Really, the whole drama regarding Voyager's torpedoes could have just been avoided if they hadn't had that line in the first season saying exactly how many they had aboard and added that that can't be replaced. Sure it may seem to make for a dramatic moment in one episode, but they had to have known the fans would be keeping track, and when you think things over, there's no logical reason why they can't manufacture new torpedoes.