@alberto_cottica No, it's not up and running. That's the wait and see part.
I've noticed how infosec.exchange created a second server to solve the federation dilemma. Their original server has 15 k users and the other, infosec.space, has fewer than 100 users. We can observe how that develops over the next few months.
From my point of view there isn't any rush to create a second server. Meta isn't even fully federated yet. It's one way as far as I understand it.