I disagree that a museum is a solution to the problem of being unable to save everything. If you want anything resembling an extensive historical collection, it has to be done through the transit agency. I have every respect for HCRR, but the fact that they rely on volunteer donations and labour and don't have access to TTC facilities, for storage or maintenance, works against them. In some ways it feels like they've become victims of their own success. Contrast it against a city like New York , which has an extensive historical collection owned and maintained directly by the city. To rely on a museum would be akin to relying on a museum like Seashore or Shoreline to do the heavy lifting for preservation in New York; to say nothing of how woefully inaccessible HCRR is if you don't have a car.
What it needs is a culture of interest in history, and the will, both of which are sorely lacking in this city in general. There's been a bit of an attitude shift since the darker days, but is it enough, and is it sustainable, in the long term? Only time will tell.