Board Thread:Questions and Answers/@comment-107.10.143.192-20131103035931/@comment-15636815-20150806055850

King of the Race is not the only electric cargo set in the game.

Another answer to the question in the OP is: Because it shows that there's a time and a place for everything. Even if the bonuses need to be adjusted to keep the game balanced, it's appropriate for Pixel to give us a diesel passenger set and an electric cargo set occasionally.

Some would argue that they're not only appropriate, but also necessary. After all, those things exist with real trains. Why shouldn't they exist in one of the best train games ever made?