I don't know for a fact, but based on the usability test videos I have been watching, I think no normal person will understand njump. And I am not trying to trash on anyone or anything, it's just me coming to realization of how people see things. Of course, if they encounter it a few times, they may ask around or figure it out, and then it may make sense. But for a new experience I have a feeling it'll leave people totally clueless. 

I have designed what I believe to be a better experience (except for the issues that were pointed out regarding hover / mobile interaction). The gist of it is opening in one client and giving options for others, but tucked away behind a click. The theory is that seeing too many links is overwhelming and people won't understand what they're looking at.

Of course, existing nostr users may be fine and it may actually work great for them, in which case they don't need explainers.