[bheadmaster]

You are right.

Now that I've had more time to think about it, I think the problem of Python-like tuples in Go is that they require Pythonesque everything-is-a-reference paradigm in order to function the same way, otherwise they just act as heterogenous arrays in Go (which exist as arrays of empty interfaces, with a slight runtime cost). Go is mainly value-oriented language like C, with the exception of built-in container types and strings (and maybe a few others that slipped my mind).

I suppose that adding fixed-type pass-by-value tuples would essencially be reimplementing struct. Go doesn't like duplicating functionality.

[eru]

See my other comment: tuples should be thought of as syntactic sugar over structs, not arrays.

Whether to pass by reference or value and other design decisions should probably be taken (as much as practicable) from the design decisions for structs in your language.