There's actually a couple of minor things (like covariance). I was surprised to learn F# doesn't support creating sealed methods on classes the other week when

There's actually a couple of minor things (like covariance). I was surprised to learn F# doesn't support creating sealed methods on classes the other week when I was extending some OO code. Thankfully F# and C# mix so well together I could've written a quick C# project to do it if needed, but I didn't want to break up my F# project into two + some C# glue In the vast majority of cases though what you said is true. Discriminated unions, records, computation expressions, and type providers are total game changers