We have some of that, but it's not the whiteboards. The dev one gets used multiple times a day in a room with only developers. No management, no power structure around.

It's my general experience, also in prior workplaces, that sometimes a little drawing can tell a lot, and there's no quicker way to start it than to walk 3 meters and grab a marker. Same for getting attention towards a particular part of the board. On Excalidraw, it's difficult to coordinate people dynamically. On a whiteboard, people just point to the parts they're talking about while talking instinctively, so you don't get person A arguing with person B about Y while B thinks they are talking about D which is pretty close to Y as a topic.