Admittedly I’m mainly following AUKUS since my wife is involved, but looking at the timelines — IF Canada was to consider joining the modern SSN kids with AUKUS, like the Aussies there would be a significant pipeline requirement for crews.
Which from OS reports looks sort of like:
1) Training
2) OJT on USN boats
3) Split Crewing of boats
4) Pure Crewing of ‘leased’ boats.
5) AUKUS boats being operational in the Navy.
Then there is domestic infrastructure.
I suspect that 2045 is a realistic time frame for if Canada was to get involved before there would be a AUKUS with a Canadian home port, and 2065 before a 8-12 fleet was reached.