old world blues
Being so wrapped up in nostalgia for the past that you can not see or be a part of the current or future world.
Joe-24: See how he sit in that rocking chair, staring at nothing even though the hypnotron is on?
Jeb-16: Leave old #3 alone, Joe. He's just thinking about when food didn't come in squeeze tubes.
J-24: Haha, food always came in squeeze tubes! ...didn't they?
J-16: ...dem Old World Blues.