From direct experience - It’s not that hard to stand up entirely separate teams and eventually entire departments in foreign countries. Communication then mostl

From direct experience - It’s not that hard to stand up entirely separate teams and eventually entire departments in foreign countries. Communication then mostly happens by e-mail or during scheduled calls during narrow overlapping hours. You’re right that it’s far, far harder to have teams built from members in opposite time zones. However, the people pushing for fully asynchronous work environments are building company dynamics that lend themselves to being timezone agnostic, so it can be done if you want it badly enough.