Just discovered an interesting example of theoretical seating on a FRA-CPH flight on Thursday. I’m in 4C, and according to ExpertFlyer, both 4A and 4B have been blocked. The same “row-block” has been applied to a couple of other passengers, but for most, only the middle seat is blocked.

In the SAS app, all the blocked seats appear free to me, so these are indeed soft blocks and not due to faulty seats or weight balancing or what not.

It’s a pretty big cabin - 10 rows, with rows 7-10 still being completely empty, and 1-6 lightly filled. My guess is that diamonds are getting the “double block” and golds the blocked middle seat.