[Haskell-cafe] Why is the no tuple syntax for sum types

[Albert Y. C. Lai]

On 2015-08-03 06:07 PM, Richard A. O'Keefe wrote:
> This sudden enthusiasm for them strikes me as being like
> a sudden enthusiasm for punched cards, paper tape, or PL/I.

Oh! Punch cards can represent sum types (use different hole positions to 
indicate different variants), and tapes can represent tuple types!

On the bright side, I haven't found a use of PL/I.