In C#, you have structs, that are value types. Value types are types that are passed by value, and can be efficently inlined in stack for example. The more similar thing that I can see in Julia are inmutable types. As I understand it, in C# sometimes you want to use structs for perfomance reasons, and in Julia, you want to use inmutable types for the same reasons: avoid boxing mainly.
So, my question is: why the most similar thing in Julia to C#'s value types is inmutable too? Why not only allow pass by value types and take inmutability as a orthogonal thing?
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