Modern Family uses the mockumentary style, with the characters being followed around by an unseen documentary crew.
The show has never really dived into the purpose of why the film crew is following this particular family for 10 years of their lives and it could be a good way to cap off the series.
Rico Rodriguez isn’t the one who has to worry about this particular decision, but he has thought about how Modern Family should end and he thinks it’d be cool to reveal what is the purpose of the documentary that has been filming the Dunphy-Pritchett clan all these years.