In the before time, I'd optimize productivity with a mix of modalities. Some things were best done with technical pen on paper. Others as outline or text files. Others with assorted styles of coding. Whiteboards and discussion. And others with assorted styles of walking. The long slow ponder. The quick brief pace for a minor decision. The "what am I'm missing here?" distracted walking into walls.:) Matching modality to the moment seemed an art form.

I've fond memories of one site, a few cubicles and tables in one corner of a big otherwise-empty floor of a office park building. A floor wrapped with full-height windows looking out on trees. One could variously loop, without bothering anyone, alternating walking and desk work.