[Haskell-cafe] Investing in languages (Was: What is your favourite Haskell "aha" moment?)

[Tom Ellis]

On Fri, Jul 13, 2018 at 08:49:02PM +0200, Joachim Durchholz wrote:
> The other issue is that Haskell's extensions make it more difficult to have
> library code interoperate.

Do they?  Can you give any examples?