No one knows, they said today and i suppose they may have found something that breaks and held off but are still hopeful to deploy this evening. Better to wait till they are sure they are putting it live I suppose.
I mean its kind of cool they increased the cap to 450K players from the lower limit it was at. The one thing i haven't seen confirmed is if that limit is for steam + PS5 combined, which I expect it is. Keep seeing people say, oh only X amount of players on steam so you can play if you log in now. Yeah, nope, full.
I mean it is crossplay and so I would expect everyone on the same servers. In some ways im a bit sorry for them. In a month or two the numbers of people who move onto another game will cause the players to drop below the current highs its experiencing. However any new content in the future will have the same issue so I suppose better to sort it out now.