I don't want to be friends with my coworkers, but I do want to have a relationship with them. WFH has meant that we're basically all just doing our thing, occasionally talking on slack/jira but mostly just blissfully unaware of the interesting challenges others are facing, especially on other teams. Imo collaboration is much more difficult with people you have no relationship with, and video calls absolutely do not work as well as in person whiteboarding,