The problem is that a great portion of all Curve cards currently in use are Wirecard issued. There’s a substantial risk of Wirecard going into bankruptcy during the weekend or at the start of next week as their line of credit is greatly endangered. Yes, they have operations working, but their credit supply is in imminent danger. We are also at risk of Mastercard stepping in.
Now for Curve this is thankfully a smaller issue than e.g. one year ago, but it means a very large card replacement project would possibly have to be done ASAP and cards could stop working very soon, depending on how any Wirecard default would be executed in practical terms.
So I would be very cautious regarding any old Wirecard issued Curve cards for the near future, until one has a card that isn’t their.