So they updated it? https://coinweek.com/dealers-compan...e-smithsonian-national-numismatic-collection/
Thank you for the link. It's very interesting. I'd bet there are treasures that rarely leave the Museum's vault. I'm going to try to go to D.C. this summer.
It is very common for museums to rotate their displays every couple of years. Especially if they have a vast collection and limited space to display it. There's usually a permanent display (the "wow" coins that Garrett mentions), but the museum will refresh things to tell a new story and create interest. This is also to get people coming back - you wouldn't want to go see the same thing over and over, you want to see something new.
I was there last year and all the pieces that are mentioned in the article were on display in the "new" bank vault room. Not sure if the author just got around to writing the article but I was under the impression that the display was over a year old when I saw it. I will say, it's a great collection and they did a really nice job with the selection. It could use more lighting though (maybe they fixed that). You could barely see some of the coins because it was so dark. I'm interested in going to the updated Air and Space Museum... they were really overhauling that sucker.