@RevMainPls Well yeah there is a reason for everything but that doesn't change the fact people leave jobs. I work in automotive. I have customers that change jobs all the time. Some are chasing money, some are leaving bad employers or bosses and some just want a change period. Lots of people leave after another person leaves because those people start to think about it.
Maybe the people leaving are tired of working on the same game for 5 years and want to try something else. No one knows.