[fleitz]

I think swift really found the sweet spot in this regard by not thinking about mutability but value/reference semantics.

I've found that in swift the things that should be values are and the things that should be references are, rather than taking an all or nothing approach.

[hellofunk]

Except in swift, a truly value-oriented thought process is hampered by its copy-on-write semantics, which are a far cry from immutable structures found in functional languages.

[fleitz]

Value semantics are certainly not ideal, but it is very practical.