[Kagetora]

Well of course a whole planet only being able to build one thing at a time is artificial. However as with any game it doesn't matter so much what is realistic it matters what is playable and fun. It might be more realistic to have to have 20 elements and combine those all into alloys and then those into components but then we would be playing a ship building game and not a space 4X game. The limits in the game now are arbitrary but necessary for playability. If you can build alot in one place it benefits you more to have a few good planets than alot and makes expansion less necessary.