That is a good question. We don't claim to be able to answer for other provinces and territories. I will nevertheless make one or two observations on the subject.
We must all demystify and eliminate the idea that this is a program for elites. This is often discussed and it affects all of us, whether in Quebec or in the other provinces. It is clear that, pedagogically, anyone can learn a second language very well in an immersion program. If we were able to do so, that could expand access to French immersion throughout the country.
Second, you need to determine the best way to increase the rate of bilingualism. From our point of view and yours, that should be the goal.
In our opinion, it is also possible to have an exchange between the two programs. The core program could be improved anywhere in Canada with techniques used in schools where there are French immersion programs.