Luigi Calling

I saw a girl in town the other day who was maybe fifteen wearing a t-shirt featuring the pixelated green 1-up mushroom. My thoughts in order were:

1. Nice to see some geeking out in the streets
2. Wait, when did the last 2D Mario game come out? 1990?
3. She wouldn't have been alive when it came out
4. She's probably never even played a 2D Mario game
5. What does SNES era Mario art mean to someone to who has never experienced the games?
6. Are old games the new Clash London Calling t-shirts?
7. Good Lord I'm getting old