I'm not quite sure what you mean by your claim that self-determination is an exaggeration, and that it isn't an issue for any others. Due you mean the other 17.4 million odd who voted for self determination, or are you referring to other member states of the EU? If the former, that's a fairly major 'cancellation', if the latter, well then you're way off the mark; Macron himself admitted that, had the 2016 referendum taken place in France, he wasn't confident that remain would have won. Sure, the sampled numbers since then have been overwhelmingly pro-EU, but that's undoubtedly to some extent because people have watched brexit and realised just how difficult it would be to extricate themselves. For EZ members, it would be nigh-on impossible. It is also fair to say that, until the pandemic, things were fairly benign. With the cost of living crisis, energy shortages, recession and Ukraine (and there's no greater exemplar of self-determination than Ukraine) sentiments may well shift. Despite the mood-music emanating from Brussels, just under the skin the EU is a pretty fractured union right now.