What I wonder is if the devs somehow never noticed the problem themselves, or just decided it wasn't enough of a problem to put off the initial release? I dunno, maybe they all have super powerful computers or something, but for me, even a small house on some terraformed ground and my normally 60-ish framerate was noticeably lower in my house specifically. Then I added a carrot patch and it got a little worse. If they played their own game, surely they must have noticed the same thing?