>>1594926I mean the AEs kinda were already, when you consider the fact they were so enormous that they had to be shipped in pieces. Really, they're the *only* class of steam loco with more than 16 drivers that had a successful career.
As for Allegheny's, their problem is that, while having a lot of horsepower, their tractive effort was barely any better than the locos they replaced. (In fact, a whole lot of "superpower" steam was used in ways that wasted the advantages they had over locos with fewer bogie wheels.)
