The 4 wide teleporters are sometimes a pain to build with. Many times when i (and probably many others) have been building a base, a castle, a underwater base etc. and was going to placing the teleporter or remodel the room the teleporter was in, the teleporter would not be in the middle of the room because the room was a odd number while the teleporter was a even number so i had to have 2 teleporters. And having to buy another teleporter costs a lot of money i may need for other things. If i had a 5 or 3 wide i wouldn’t need to spend as much money, it would be in the middle of the room and i wouldn’t need 2 locations to teleport to that is like 2 blocks away from each other.