Coordination, mentoring, and culture are intentional.
They are, but you may have issues with keeping up these with full remote, where people don’t get all the social cues that they would get in an office.
Hell, listen to a lot of the criticism here. Executives and management are trying to “control” workers instead of blindly following individual productivity measurements, even if those individual productivity metrics may not be good for the company.
You may also have cases where the culture role was given to a senior member that no one longer listens to because there isn’t a direct chain of command and the duties aren’t made explicit to everyone.
Full remote can work, but I feel like a lot of companies are finding that it isn’t working as advertised compared to being in office and there isn’t a known way to do so that they can implement. So, they are going back.