[mhays]

In the US, offices were moving heavily to the suburbs in the 60s and 70s.

It wasn't primarily about improved communication. It was primarily the idea that the suburban campus was a nicer place to work and lacked distractions.

In the desirable cores with decent transit, the shift back to urban office locations was in play by the tech boom around 1999, in part because the wants of 20-something grads became critical and the idea of innovation through mixing with others came to the forefront.

Residential population is hugely important. So are workers. If you want to carry that through, also include hotel guests, shoppers, students, and so on. They're all part of the stew. And they all have different profiles about when they're around, what they buy, and so on, so a diverse mix is essential.