Authors:

You heard people say forty was the new thirty and fifty was the new forty and sixty was the new forty-five, but you never heard anybody say eighty was the new anything. Eighty was just eighty.

John Lanchester (2012). “Capital”, p.81, Faber & Faber
You heard people say forty was the new thirty and fifty was the new forty and sixty was the new forty-five, but you never heard anybody say eighty was the new anything. Eighty was just eighty.