@tobiaseigen went into a little detail about that when it was spotted the other day:
Basically, apart from the small initial snafu, all new sites will get a #general category, and no #lounge. And uncategorised will be phased out for them too.
I thought I had stashed ours away while we decide if we want to move over own #uncategorized topics into it yet or not. Obviously I did not.
