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The limit being that the whole program, including all dependent crates need to compiled from source with the same compiler.

Other languages, like Java, C, C++, C#, F#…, also embrace binary libraries and multiple implementations.

Rust editions currently don't have an answer for such scenarios.

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Totally different ecosystem that’s built around the concept of building from source. Binary libraries and alternate compiler implementations haven’t been a priority. In fact, multiple compiler implementations generally don’t exist until the language is much older than Rust is now. It’ll happen.

>The limit being that the whole program, including all dependent crates need to compiled from source with the same compiler.

Which isn't really much of a problem given that the ecosystem is built around cargo compiling from source.

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