The rules aren't "unenforced". Sweden, and the other non-eurozone countries without an opt-out, are complying with the rules. There's no rule requiring the EU members to meet the convergence criteria.
Instead of accussing me of lying, you could've just looked up the relevant treaties.
Instead of accussing me of lying, you could've just looked up the relevant treaties.
Here's an abridged summary: https://economy-finance.ec.europa.eu/euro/enlargement-euro-a...
And this is about ERM II, it explicitly says that it's voluntary: https://economy-finance.ec.europa.eu/euro/enlargement-euro-a...
The full treaty on European Union is here: https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CEL...