The system is now geographically and demographically fixed so that the Liberals will win every election going forward.
There is only slim chance that they lose: if the sitting Liberal PM absolutely goes off the rails (as Trudeau pretty well did) and then the PQ wins enough seats to form a minority government with the PC party. Other than that, it's Liberals all day and night.
Think about it, a massively-corrupt, misogynistic, blackface Liberal PM still managed to sneak out a victory.