Well, if you're going to be away for a little while and you haven't yet got really good reliable sources of food, might be a good idea to put it on 1/2 speed (or pause). But if you're talking about the benefit (exploit) that there used to be in VV1, it isn't there any more

However, there are differences... you get less points, for instance for fishing and coconuts on 1/2 speed than for normal, than for 2x