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

[Richard A. O'Keefe]

I'm a little puzzled by all of this,
having learned ML before there was such a thing as Standard ML.
Anonymous sums, with inl, inr, outl, outr and so on
are one thing I was very happy to see the back of.
This sudden enthusiasm for them strikes me as being like
a sudden enthusiasm for punched cards, paper tape, or PL/I.