There was a national uproar. People no longer knew how to make their beds.
Attempts were made at convincing them to bring the holes back but without success. We have now settled for the typical Swedish response of making an angry fist with the hand securely hidden inside a pants pocket.
Long story but we went to someone to have a cover custom made (she advertised this kind of thing, and for us it was partially to use fabric that had sentimental value for us). She ended up arguing with us about how we didn't need the holes, and demonstrated this flip move that seemed impractical for a large comforter.
I wish all duvets and covers had ties, and more importantly covers with holes. It's so much simpler and direct a solution.