Try sharing a completely open office concept with 250 people on one floor, it's a joke. Now that I have worked in both a office with walls and this open office

Try sharing a completely open office concept with 250 people on one floor, it's a joke. Now that I have worked in both a office with walls and this open office concept I can see that people get much more work done in a cubical with walls or an actual office where you can close a door and focus.