Don’t think it’s as easy as that. They’d now need to ask to join, then for the EU open negotiations, then put the terms to the people.

Or they could ask the people if they should go ahead and negotiate to rejoin, then risk failing in the negotiations as the terms won’t be as favourable as they were when they were in their special position last time. (Though given current geopolitics maybe the EU would be a lot more accepting of previous terms, don’t know).

Either way there’s a lot of political risk there.

Then they’ll send their kids to live and study in Europe like third world oligarchs do with their kids, “I want all the benefits of liberal multiculturalism and rule of law for my offspring but not for my subjects”.

Tbf, Signal, and most modern chat clients with multi-device syncing are not great for opsec.

When it comes to privacy from mass surveillance or using your metadata to mine demographic preferences who you are talking to etc Signal sits at the top of generally available chat clients.

But it’s geared for the convenience and privacy of the average user not military security.

Eg: when it comes to group chats you just have to get one of the members of the chat to fall for a device syncing link, for then the whole group chat future messages to become available to the attacker. What’s more, no admin or other user of the chat gets to have approval or visibility privileges or notification of a new synced device for that chat or any info about the status of each of the devices on that chat.