Buying a home and getting grounded was the key for my community integration. It is very clear who are tenants and who are the owners. The owners came with cookies and Glühwein to remove together snow from our street. Tenants didn’t show up. They know and we know that they will be gone sooner or later. So why waste time with strangers?

Edit: what I want to say is that mobility does not create community and stability. I see this in Germany often: school system does not create community either. A child must go through at least couple schools. So the friends get lost and strong friendship does not happen in the last school.