I can answer that, basically we do our dev communication on discord.

it is easier to chat there when it comes to development and feedback etc...

But the dev teams of nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7qghwaehxw309aex2mrp0yh8qunfd4skctnwv46z7qg6waehxw309aexjcn09ejh2tnwdaehgunfvyhxzurs9uqzp5daxvenwv7ucsglpm5f8vuts530cr0zylllgkwejpzvak0x2kqmehusjv and nostr:nprofile1qqs8p3ywfd92w7zvjgy7wrpylz8t30hy3z5dc5al4070l9y8qr8rejcksnh5c (and others) have been looking for a Nostr based alternative for sure.