To me, #Rust's biggest fault is the compilation size. It promises to be somewhat functional language, yet it can't do tree shake down to function level.
The reason why I like the idea of compilation that includes only the functions I use is that it makes library writing easy.
For example in Elm which supports perfect pruning, you can make huge libraries, and not need to think about bloat, because the compiler will only compile the parts you use in.
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