Micah Sweet
Level Up & OSR Enthusiast
Given the things they have changed, I see no reason to assume anything from the old rules that hasn't already been confirmed is still the same.I am currently going by old Spelljammer rules this might change with the new version. Objects and creatures of a large enough size will generate their own gravity plane in Wildspace which forms a bubble around them, and can take atmosphere with them into Wildspace. Smaller atmospheres can be replenished by running into other atmospheres, while ones on the larger side can self maintain.