DH Canada couldn't survive alone IMHO.
The union in that shop is radical. They still think they are like a crown corporation.
Even Boeing couldn't make it work and they sold it to Bombardier.
Without the sale to Bombardier, DH would probably be dead today.
Bombardier management probably had to twist the union's arms to get concessions to make it work.
Anyway, IMHO, I don't think DH on its own would survive for very long.