YMMV / The Simpsons S 13 E 13 The Old Man And The Key
"Funny Aneurysm" Moment: As of 2013, two of the Branson celebrities are no longer merely mistaken to be dead: Charlie Callas, who died in 2011, and Bonnie Franklin, who died in 2013. And it'll only worsen once the other celebrities die off as well.
Memetic Mutation: The newspaper clipping of Grandpa Simpson, captioned "Old Man yells at cloud", has had considerable traction online. Particularly after Clint Eastwood's speech at the 2012 Republican National Convention, which had Grandpa's image replaced with Eastwood's, and the caption changed to "Old Man yells at chair".
Unintentional Period Piece: Part of the lyrics to "Ode to Branson" include "They took Nick At Nite and made it a town," though by 2001, Nick at Nite was airing a lot less pre-1990s programming, and more contemporary cancelled sitcoms (along with a few original shows.)