531
People born after 2000 have never seen the cosmic microwave background on their TV set.
(startrek.website)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.
Do you think CRTs just magically disappeared after the turn of the millennium?
No, I just couldn't remember exactly when. And as another commenter pointed out, what I should have said was analog TV's.