The likes on keyword/optional args wishlist is an indication of how much perceived need/interest there is on a feature like this.
Apart from this post, there are a couple of excellent comments on that thread listing motivations:
- https://github.com/rust-lang/rfcs/issues/323#issuecomment-426918479
- https://github.com/rust-lang/rfcs/issues/323#issuecomment-508943863
Structural records (which btw, is not an accepted RFC yet) is frequently mentioned as a alternative to this. But as I have argued before, it is a poor substitute for function arguments.