I'm posting this in response to my own photo, showcasing two brand new SD70M-2's shining away.
This is the other side of new motive power acquisition.
CN 9551, a GP40-2LW is seen on a E/B manifest, travelling CN's mainline, from the same angle, at two different times in its life.
I think you get the picture. Ironically the handrails are shiny now. Looks like CN salvaged them off of another unit - plenty GP40-2LW's going out of service.
PS. Final irony is that even the "new" photo is historic now, CN 346 has since been updated to a DPU train, powered by those SD70M-2/ES44AC monsters, this guy is not good enough anymore.