Ux is pretty good but not as feature rich is telegram yet.

I don't think group chats are very private, but neither is Telegram.

These will both improve with time & users.

You won't get the scammers just dropping in.

It will get better with time & your identity (account) moves with you if something better is created.

I think it's a sly roundabout way to bring Bitcoiners into Nostr.