GE did try to interest CDN railways with demonstrators at times, and never seemed to impress anyone here. It has alot to do with 'thriftyness" for lack of a better word...CN and CP were quite content at one time to make things run forever, CP skipping entirely over any type of "3rd generation" power, and CN having only the SD50F/SD60F. Alco powered products were not regarded that same way here as in the US, and therefore lasted much longer. Even now, I believe(on good authority in some cases), the only reason for the swing to GE in recent years, has more to do with the warranty than anything else. Also, the fact that 3rd generation GM products never really had raving reviews, even in the US in many cases....when it came time to supplement/replace the SD40-2's, especiallly in CP's case, who weren't exactly thrilled with their last GM purchase, were in the mood to try something new.