Maybe it has dipped, I don't know but you're fragmenting peoples time between nostr and stacker news and people can only dedicate so much to a platform, and its a small group of people willing to explore these sites right now, bull market comes you have a bunch of people flooding it looking to bag sats or find solid info on bitcoin and shitcoins
I don't think everything needs to run on nostr, I think its still pretty slow and clunky and theres a bunch of people who will come in and lose their keys like they did with bitcoin and then blame nostr and be off it, and look for apps that cater to them instead
Also, I don't see clients really going after the same niche/user experience as SN