just generally speaking about niche interest and expertise, (not specifically 'lichen expert' lol) they're on twitter because there will be other people with their interest and the possibility of finding even more, or the possibility of reaching people via the massive userbase. And having meaningful conversation, making real life connections, events, career opportunities etc etc.

Now imagine a lichen expert on nostr. 

That's why they're not here, none of these conditions are already here for them, and even worse, there's not much hope for the possibility of these conditions emerging on nostr. Certainly not any time soon. 

 I agree (I have interests I don’t post about akin to the lichen expert). Can even compare this with the number of Brits here. Feels like that number is barely into double figures at the moment. I’m hopeful things will evolve in time though.