In 2007 Ikea stopped selling duvet covers with holes in the corners. “It’s for the international market” they said.

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.

I refuse to buy any duvets that don't have the holes. It's too much of a convenience.

I was annoyed at first and iirc my ex-GF cut the corners, once I realized the put-hands-inside-edges-of-inverted-cover-and-grab-the-duvet-corners-and-pull-through method I've mellowed on them since it goes fairly quickly.

I personally just used the covers alone, but I also found out that finally there is some with buttons or even with zipper. And pillow covers with zippers are amazing.