On the flip side, it's somehow easier to get people to attend scheduled meetings.
It is the same thing. In our case it's not attached to the seniority. The person ending their shifts replays its incident when there has been one, with the person who is taking the pager after them. We are deeper in the infrastructure so we don't have customers but we roleplay stakeholders (lead/head, principals, developer). My favorite is the person who has experienced something wrong but it is only this person and bad luck :P