The difference in size is huge 140000t to 64t. A single core makes more sense, specially because you can put a bigger space ship on top for a rocket of equal p

The difference in size is huge 140000t to 64t. A single core makes more sense, specially because you can put a bigger space ship on top for a rocket of equal power. The 3 core design is only a economic way to get a bigger rocket with a existing design. Look at the Delta 4 Heavy for example.