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Also, what is its FFI story? How easy it is to interop with C++ and JavaScript?
Probably also Rust having a novel memory management model and being backed by a large organisation (Mozilla) had a lot to do with its early success.
Corporate support is absolutely essential for a new language to be taken seriously in the industry. If Go weren't associated with Google, people would have laughed that language out of the room long ago. Likewise, it's difficult to imagine TypeScript ever catching on if it didn't have Microsoft's might behind it (even though TypeScript is actually an excellent language).
Without the power of money, you are nothing.
Rust also stroke a programmers thirst for learning new concepts (or ego).
It’s basically good vs interesting.
"very exciting features such as macro support, pythonic syntax, transpiles to C/C++/JavaScript, no VM, systems programming language, suitable for hard real-time systems etc" is not a good elevator pitch. Its a little bit of everything with no clear focus point.
So I'd say rust had better marketing.
Rust had Mozilla's backing, and later other behemoths like Amazon and Microsoft jumped onto the bandwagon. Corporate support is absolutely essential for a new language to be taken seriously in the industry. If Go weren't associated with Google, people would have laughed that language out of the room long ago. Likewise, it's difficult to imagine TypeScript ever catching on if it didn't have Microsoft's might behind it…
Nim has excellent C++ FFI. It's not perfect, but capable of wrapping C++ templates, calling constructors, and virtual methods. Though it can be a pain dealing with inner template types and consts. Here's a larger example of C++ interfacing with Unreal Engine: https://github.com/jmgomez/NimForUE