All these years, I've been growing a number of neps, seen many die and tried again. It just hit me, I have never really noticed the reason why neps have few leaves sometimes and other times, more than 6 leaves. I had always thought that fewer leaves mean a less healthy neps, but after seeing many other neps from pictures from the wild and other forumers, I do not find that true.
Take for example, my dyeriana has leaves that were put out nearly 4 months ago. And those leaves haven't dried up until now.