Quebec has been threatening to leave for decades, and I remember how shocked people were here when the Parti Quebecois won provincially there, back in 1976. Suddenly there were many people here sporting bumper stickers on their vehicles that said "My country includes Quebec."there's a substantial difference in demographics, where country subsidizes, and even language between different parts of canada. these things are not guarantees that a country breaks up, but they are risk factors. i think if the above actually happens, quebec would break away too...or rather either one happening would encourage the other to follow suit as it implies insufficient stability for canada as it is today to stop it.
i put canada breaking up this way as more likely than puerto rico (they have virtually no incentive to go independent right now), but less likely than quite a few of the others on the list.
Does their country include Alberta? Apparently not, since they already pretend to be their own country and pass draconian language laws almost guaranteed to keep anglophones from even wanting to visit, let alone settle there. The latest language law gives immigrants/refugees 6 months to become fluent in French and after that they will not receive any services in any language but French. So good luck with trying to explain medical issues in a language where you lack the vocabulary to explain the problem or understand the reply. Good luck accessing the courts, or dealing with a social worker... all the people involved may know the person's language but would be forbidden to speak it with them.
And then we get to the indigenous peoples' objections to this language law. But I suppose it will force our Governor-General to step up her efforts to learn French. She's from Quebec and never learned French because it wasn't taught at the school she had to attend (she's indigenous). But since she's had an apparently distinguished career as a diplomat for 20-odd years before becoming GG, people have been wondering why she never learned during those years. Surely any Canadian diplomat at that level would have learned it, if only to foster diplomatic relations with the francophone countries around the world. The GG is required to be bilingual, and I guess in her situation that's technically true... but outside of Canada there's no real call to communicate in Inuktitut. She promised to learn French only after she was sworn in as GG.