I don't think that people really see the advantage of currying until they work in an ML-derived language like Haskell. The syntax is tuned to make it easy and you get very nice design affordances.

In languages like Scala, C#, etc., currying was an afterthought and it shows. I actually think it's a shame that the Lisps make currying unnatural also. Yes, they have homoiconicity, but it's a sad tradeoff.