I don't get how you would even compare that. Do you have any idea at all what it technically means to make a game like No Mans Sky basically into an MMO, even though 99.9% of all players will only play it single player? That's like adding a "theme park" building to PA that allows you to zoom in onto the thing and play a full fledged "theme park tycoon" inside of it while outside tanks role by. Utterly pointless and a total waste of time to basically all your other efforts in the game you develop. Sure a bunch of nice looking graphical playthings or mods. Fine that makes sense. But NMS with MMO-but-actually-you-won't-use-it mechanics? Just makes no sense. A feature that is expected to be used only by 0.01% or less of your players should not cost you weeks or month of development time.