Title text:
If you want to see true audacity, do an image search for 'Altoona-style pizza.'
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3142/
I seriously doubt it's the most common pizza sold.
It's thin crust nature makes it economical for selling hot slices, but horrible for delivery and for reheating.
I personally consider New York pizza to be A tier; S tier I reserve for pizza with a slightly thicker, slightly sour, focaccia-like crust, and regardless, the baseline should be B-Tier.