I don't think one of them is more clear or maintainable universally, but in a lot of contexts, there might be an obvious choice. As a trivial example (that isn'

I don't think one of them is more clear or maintainable universally, but in a lot of contexts, there might be an obvious choice. As a trivial example (that isn't quite fair given that the topic is about structs), it will almost never be more clear or maintainable to pass a shared reference to an integer (although there may be cases where a mutable reference might make sense). I don't think there's much need for one to have precedence over the other by default; if anything, I see the discussion about performance tradeoffs not being worth fretting about in the absence of actual measurement to be an argument _against_ one of them being inherently preferable.