> My solution to endless teams convos is to just say "I'll head over to your desk" and then we work it out in person.

A good replacement for this is a voice or video call with screen sharing. As a bonus, you can rope in folks who are at another site just as easily as you can the first participant. Need to see notes on paper or a whiteboard? Pay the one-time cost to up another camera.

If the folks you work with don't have a "Always respond quickly to urgent messaging requests" habit, then they'll need to develop that. But, IMO, not having that habit is roughly the same as being the type that is rarely at their desk (whether because he's off helping others, or because he prefers to work on a laptop somewhere else in the building).