what is the most under-appreciated feature of nostr?

The fact that it can be extended with new functionality, like lightning tipping, badges, realtime ephemeral chat, typing notifications, likes/reactions. retweets, etc. there are all different note types on the network. There is so much yet to explore in terms of what nostr could do for the decentralized web.

who cares about this crap?

The evidence from other comments on this post shows that there are many Stacker News users that care about this. So hopefully that answers your question.

I wish there was an option of downvoting here