Article 116 ā Residence Permit for holders of long-term residence status in another EU Member State ā The Official Website of Portuguese Immigration (sef.pt)
For those non-EU citizens that have an EU long term residence card in another EU country, it appears that SEF is discussing a method of exchanging the card for a Portuguese equivalent.
Does anyone have any information, guidance or experience of this process please?
There have already been legal cases back in the day where e.g. Spain didnāt want to let in Argentinians with Italian passports (by distant descent), and the EU said it didnāt matter how they got the Italian citizenship, Spain has to honor their treaty rights.
So what you say is unlikely as it goes against legal precedent.
Well sure the EU could dissolve. Just saying that as long as the EU and its freedom of movement exists, non-discrimination of EU citizens is a pretty core part of that.