For example, during Covid when interest rates where negative - some major German banks like Commerzbank charged interest from customers when their balance exceeded an amount like 50000€. Now that the interest rates have gone up - they are not even close to passing on those high interest rates. The same Commerzbank now asks for 50000€ in assets otherwise they charge a 4.90€ subscription charge from their customers.
So yeah there might be technicalities but nothing stops those technicalities being addressed until the law does.