Go slices are absolutely the worst type in Go, because out of laziness they serve as both slices and vectors rather than have a separate, independent, and opaque vector types.

This schizophrenia is the source of most if not all their traps and issues.

> I really wish that Go's container types were persistent immutable or some-such.

That would go against everything Go holds dear, since it's allergic to immutability and provides no support whatsoever for it (aside from simple information hiding).