The Nim `with` macro by @zevv doesn't modify functions or methods (that'd require explicit handling in the macro to do so and would be a nightmare to do correctly). Which means that example from D is not applicable to the Nim version at all.

My preference is Nim over D primarily since Nim compiles to C, but also overall the community appreciates syntax sugar but also has a decent sense as to when and how to use it. Most "sugar" in Nim needs to be explicitly imported. Literally `import sugar` is one of my first lines in many files.

    let v = &mut some_annoyingly.long.thing();
    v.foo = bar;
    v.baz();

In the example you list (is that Rust, or D?), if it was in C or Nim and those were structs-within-structs and not pointers/refs then `.thing` would be copied to a new `v` (if I recall the semantics correctly). So you'd end up with a weird "logic" bug where updates would disappear. The Nim `with` macro solves that by modifying the generated code,