Yeah hashtags are clunky.
Discussion
communities...😉
Twitter uses topics and that’s a large driver of discovery for users there. They literally look at which keywords are in a tweet and put that into a topic.
The downside it that relies on a centralized entity curating the topics. They need the resources to scan every note, discard spam and caregorize it.
At least with native nostr communities, topic curation is up to the users.