> how much of the current productivity is the result of relationships that were built in the office.

This is going to be the big struggle for teams who formed in person but are now hiring remote.

I joined my current company about six months prior to the pandemic and had ample time to get to know my colleagues face-to-face, making the transition to remote working very pleasant. I'm not sure if the experience has been the same for people we've onboarded remotely; they're productive but I'm unsure if it'll be easy for them to build up the same kinds of relationships.

You also tend to get into situations where there's a social divide between a subset of the team who have constantly worked together synchronously in the past and new starters who only appear in 2D on Zoom. This may not be a problem for some people, but it's a concern for someone like me who gets a lot of their daily social interactions via work.