Right, but as part of the last pilot contract in 2024 there was a "restriction prohibiting common types between mainline and Rouge": https://www.reddit.com/r/aircanada/s/cL3iDg6GaQ

I'm not sure of the actual details specified in the agreement. I assume the 320 family had some sort of grandfather clause, and the 7M8 transfer won't happen overnight, but I assume they can't operate a mixed 7M8 fleet long-term.