I'm on Hyperspace and Narrative in the same extremely limited scope that I am on steem. On both sites there's a lot more activity going on outside of my scope. I haven't gone around Hyperspace lately so not sure where the comments are at. Narrative is currently in the stage where most of the comments and upvotes are concentrated on the meta posts.
Development-wise I have no idea what's going on with Hyperspace as I'm either not following that space, those types of discussions aren't happening on-site or aren't happening where we can see them. Narrative recently rolled out Publications and seem to be in a similar kind of frictional trouble spot that steem was in a year or so ago so it's going.
They're both a lot newer than steem though so may have smaller userbases (I have been too lazy to check).