As a person who started writing rust this last week, I think I might have picked the best possible time to get in on it. The community is amazing, and I actually understand all these features that were released I've run into about half of the issues they fix already. Rust is coming along very very nicely.
what else would you say it is missing?
I haven't used it enough to have much more to say -- I've found everything pretty ergonomic so far (especially for a C/C++-tier language), I was most frequently confused when thinking of the most idiomatic way of doing something, but that's remedied by reading more (the rust book first/second edition, the rust cookbook). This should change over the coming weeks.
This isn't a particularly useful comment, but I chose Rust over Common Lisp recently for this new project, and I've found the std library's google-ability to be excellent for rust -- very few pages about steel have come up so far ("result rust" in DDG brings up rustlang related links). When I explored CL, I did not find that to be the case, but maybe I just didn't know where to look -- hyperspec is close but it is a terrible document to navigate through, and the 90s graphics didn't help (though they were nostalgic). Rust documentation is very often concise, well structured, and passably beautiful. I was also pleased with the Abstract Data Type solution in rust -- tagged unions. Some code:
#[derive(Debug)]
pub enum ConfigLoadError {
EmptyFilePath,
IO(IOError),
TomlParse(TomlError)
}