I think it is an oversight: Box isn't particularly special with how it handles ownership, but people do get the wrong impression that Box is the way to have uniquely owned data, whereas it is actually the default. This happens less now that Box doesn't have special syntax, but I agree with you that we may be able to improve those docs in this respect.

Unfortunately, it can be hard to have an example that's simple enough to understand, while still emphasising the right concepts. Hopefully we can find something.

> nothing like the OP's `fn take_ownership(obj: MyStruct)` example.

It uses Box to demonstrate ownership in the first section, but that works the same way with any Rust type unless said type was opted into copy semantics, there's nothing special or magical about Box (at least in that respect), it's just a wrapper for a raw pointer.