The San Francisco 49ers have dealt with significant roster turnover since their most recent Super Bowl appearance. Others have dealt with similar turnover, but the context of the 49ers turnover is the big issue.
The San Francisco 49ers have seen four players retire this offseason, and numerous notable players depart in free agency. As the departures have happened, there has been all kinds of chatter about the significant roster turnover since Super Bowl 47. Since that game, only eight starters remain on the roster.
This tweet, or versions of it, have been floating around at different times this offseason.