I believe Carbit Paints may be gone from their Kingsbury Street location. There was a for sale sign on the building recently.
From the mid-1980s on I never saw a freight car on their interesting siding and spur off Kingsbury. Then over time segments of their tracks were paved over.
Sipi Metals is still a current rail customer, though it is sporadic, unless something happened recently.
The best opportunity for the Chicago Terminal Railroad IMHO would be to open up a transload facility on Goose Island for truck to train interchange. Perhaps Waste Management can once again also become a rail served customer on Goose Island-part of their spur is still in place, though covered in dirt and asphalt.