All told, proposed passenger service over the NP notwithstanding, BN ("The Merger That Worked") chose not to whack that line was wise on their part. SCL think, especially if an SAL line, stayed at 500 Water.
Yes, post-PANAMAX is to make every West Coast into a backwater, well that's what they say. But what if the story turns out different? What if the new canal sets the tolls prohibitively high, what if it is mired in corruption (Senor, want to get your vessel through? There's a Swiss Bank account that needs a little "replenishment"), what of the maritime companies decide they like those monsters like Maersk has ordered?
Maintaining that line, even if presently dark and if it were to handle any volume of traffic, freight or passenger, would need to be PTC compliant, it's there and apparently not about to get "the treatment" afforded my MILW (I do respect your contrary views, Mr. Meyer).