The standard is 200 sqft of office space per employee (this factors in conference rooms, common space, bathrooms, etc). That means best case, you are looking at approximately 300 people per football field of office space.

Colocating functional teams together, and by extension the teams they need to work with, is a great idea but the math just doesn't work out for a company of more than a few hundred employees. At the minimum you are still traveling to other buildings on the same campus to have meetings.

None of us want to spend our life on Zoom. But I'll take a few hours a day of calls to get back 2 hours a day in traffic that I can spend having coffee with my wife and petting my dogs.