We have an open slack call all day, if you want someone you just say "Bob, are you free". Bob is either busy and ignores you, or has time and can deal straight away.
You can leave if you don't want to be disturbed far more easily than leaving a room, so has the benefits of the "Hey Bob" but with fewer drawbacks
I see no benefits of an office environment for my team (but then the 6 of us were split over multiple locations before covid) - the benefits are in the informal communication with people from other teams.
