Their HQ was designed / built when it looked like they would grow forever and before the pandemic encouraged a lot of 'hybrid' options. The complex is (afaik) still 3/4 Uber, 1/4 OpenAI after this - it was nearly 1 million sq ft of office space.

Uber has four office buildings in SF mission bay. One was never used, the other 3 were underutilized, so employees are going to be moved/consolidated into 2. These buildings also have street-front retail lease spaces, so presumably by having more people coming into the area, that increases foot traffic for those spaces as well.