Comment by throwaway2037

    > I'm someone who would happily pay up for a lie-flat more frequently if it was priced at 2-3x a regular ticket rather than 5x+.

Can you give a city pair where economy->business upgrade costs 5x? The industry standard is about 4x for direct flights and slights less for flights with a single stopover, e.g., fly Hongkong to London with a Middle East carrier.