> But assignment is always a very cheap operation in C. That's just not true though, you can assign struct's of an arbitrarily large size to each-other and co

> But assignment is always a very cheap operation in C. That's just not true though, you can assign struct's of an arbitrarily large size to each-other and compilers will emit the equivalent of `memcpy()` to do the assignment. They might actually call `memcpy()` automatically depending on the particular compiler. The fact that if you wrap the array in a struct then you're free to copy it via assignment makes it arbitrary IMO.