It needs nuclear to avoid using gas. Ren will be curtailed anyway. May as well curtail them for nuclear. Germany is a prime example of fossils+ren combo https://app.electricitymaps.com/map/zone/DE/live/fifteen_min...
Ontario anticipates that electricity usage will climb in the future and is working to build more capacity to accommodate future demand. There will be need for increased nuclear capacity to service that. However, it remains uncertain what that has to do with a wind or solar install from 10 years ago?