Clang 18 supports `import std;` now, but you need to enable some build settings [1]. Also has `deducing this` support, which is nice - I am fully in favour of C++ continuing to poach the good parts of Rust.
However, "deducing this" has the side-effect of allowing to explicitly specify the "this" parameter in the argument list. The syntax looks the same as Rust, and the convention of calling this parameter "self" is taken from "other languages" (Python, Rust, ...)[0].
Similarly, it could be argued that the ability to pass the object by value in method is lifted from Rust. That's how I understand the GP comment anyway.
[0]: https://devblogs.microsoft.com/cppblog/cpp23-deducing-this/ "You don’t have to use the names Self and self, but I think they’re the clearest options, and this follows what several other programming languages do."