By early 2019 people started cramming extra folks into the desks ("desk buddies"). People who were often in meetings (product mostly) were asked to hotdesk.
To alleviate this, Twitter leased the basement of the building, as floors 1 and 2 were leased to other companies. Construction on the basement location was pretty secretive, with the REW (Real Estate and Workplace) team wanting to unveil the new space in a grand opening when complete.
August 2019 the space opened and... everyone hated it.