Not even that. Each NMS planet is technically a map which is unloaded when you leave it. They use a lot of visual trickery for transitions . Minecraft on the other had has a single giant map.

Volume vs Area. One is 3d(length x width x height) and the other is 2d(length x width). Besides, I think the article’s claim is wrong. Each planet is its own map unlike Minecraft’s one giant map. Once you leave the planet, that map is unloaded.