It's definitely a challenge.

Having worked in very large organizations, it's hard to quantify the influence somewhat random interactions caused by running into someone in a cafeteria or walking down the hallway.

I've had countless impromptu discussions about work that lead to productive changes.

Then there's the team angle - people really do work together better when they have this kind of engagement.

Mind, I say this as someone who is exhausted by all that interaction, so much so that my calendar, every day, has blocks of scheduled "meetings" that are just downtime for me to do work by myself in a quiet space.