Just wanted to point out that: 
Relay = Server that lets certain profiles publish a selection of stuff and others read a selection of stuff.
That's a community. 

Nostr makes these communities interoperable and monetizable. 
This so freakin' awesome and literally a first in the internet's history.

You don't have to choose between niche community or public square anymore. You can publish in multiple niche communities at once, let the members come together in the reply section and still let the "public square" read all of it. 

Also:
Communities, like chats, are so inceredibly easy to invite people to,
Communities are way harder to fake than profiles are,
Community is a group of people having everything in one place, not just chat,
Communities can have their own emoji's, prefered apps, GIF's, content templates, anything, ...
Communities is how you keep Nostr weird,
Communities can be forked and copied entirely (content, members and all...), 
Communities is how I can see all of your content about Design and none of your content on Sushi,
Communities can span the full spectrum from private to Public,
Communities are jobs for Admins, paid jobs.

Community is what we got going for us.
Choosing to hide that away to resemble Twitter/Youtube/Instagram/... seems more and more silly to me. 
Especially if you then have to solve a bunch of problems that Community Admins could have solved from the get-go (spam, curation, fairness, guidance for newbies, ....)

Lastly, Communities are just so much fun to design for 😍