It's wonderful news for those who can make very good use of it for support and discussions amongst people with the same lived experiences and facing the same challenges.
When I read the title of this thread, I wasn't sure if it was intended as a dedicated space for black people to discuss matters that directly affect black people - be it Afro hair, traditional Caribbean recipes, everyday racism and prejudice or a thousand other things. My instant reading of the thread title made me think that the OP was suggesting that all black MNers would/should abandon the 'standard' MN and use the new one instead for ALL discussions.
The first of these makes perfect sense and is, I think, long-overdue. I also hope that there can be other topics for people of other minorities for discussions of issues that affect them because of their race/racial heritage.
I am white and I see no need at all for a topic specifically for whites, because we are mainly the privileged majority. Those of us with pale white skin will sometimes get told that we look ill or 'need' to get a tan - I've even seen having very pale skin described as a 'grooming flaw' - but these comments have always come from other white (well, often orange) people - and it's not like we face a lifetime of hatred, prejudice, discrimination or deliberate/casual abuse as non-white usually do 
I would be very sad IF it were the case that black and other non-white MNers wanted to hive themselves off (as I read the thread title as suggesting) to discuss queues at Aldi, ask about the best 7-seater car or complain about Boris for his latest mishandling of whatever is currently happening - as the beauty of MN is exactly that it's populated by so many different people with so many different opinions and outlooks. However, IF this is what some black people do want, then all the best to you. 