> high-bandwidth communication

This just sounds like some sort of buzzwordy justification for hauling people back to the office.

My experience, is that communication propagates better in group-chat environments like Slack, that meetings are faster and more productive on Meet, that my work-focus is magnitudes better in the quiet of my home, and that (if absolutely needed - which is pretty much never) a get-together is more creative and productive if it doesn't happen at the office - but is at another venue altogether.