The Pubky app has one thing that at least looks interesting: this tagging stuff with words.

It's the only useful feature of NIP-32 that is underexplored on Nostr.

Thinking about it's very similar to what people have been doing with emoji reactions here and in many other apps, except for the fact that emoji reactions are stupid, undecipherable and useless and emojis are one of the lamest inventions of the internet.

Also self-tagging posts is stupid, it's much better to allow yourself or anyone else to add tags after the fact instead of requiring the post creator to somehow figure out the best tags forever for their post at creation time.

But, again, even with NIP-32 tagging of posts we still cannot do "trending tags" or "hashtag feeds" without relying on relay native filtering capabilities, otherwise it will always be a slugfest.