Why come it was never explained in the last episode why will smith never wanted to come back home once he was having so much fun back at home in philadelphia ???

https://www.youtube.com/watch?v=n3eJkf4erbI
https://www.youtube.com/watch?v=n3eJkf4erbI
https://www.youtube.com/watch?v=n3eJkf4erbI

He probably just got homesick.