Now THIS is something I am an actual expert on. I used to work on the sixth floor of the Commerce Department building (the OTHER Hoover building) at 14th and Pennsylvania in downtown DC. When I started in the early 1990s, I had a real office with a desk, a bookcase, four walls and a door. I was a GS-13, the highest you can get without being a manager. I was responsible for getting the news releases cleared and disseminated from a pretty large agency. By the time I retired 30 years later, I had a chair and a board in not a cube but a "cubby" that was 5 foot by 7 foot. Everyone was smushed together so we could hear each others' phone calls from across the room, which had no sound baffling. (Luckily, Covid came and I worked from home for 18 months until I retired.)
I always figured, what are they going to do with all the extra room in the building, which was 7 floors high and a city block large, from 14th to 15th Streets and Constitution to Pennsylvania Avenues? As my father would have said, What can do they--put in a Nordstrom?
Most of the older DC buildings are built for other modes of working--offices with doors, desks with conference tables and chairs, privacy. The FBI building on Pennsylvania Avenue was built to house a lot of paper files. That's all in the cloud now, as are all my news release archives. Commercial real estate itself needs a major rethinking, but government office real estate, where there are confidentiality and security questions to deal with, really needs one, and fast.