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If I were to rewrite Rust, I'd probably go the route of less features, not more.

Make it 70% of Rust in 10% of the code, similarly to what QBE[0] is doing with LLVM.

You'd probably be able to achieve that if you remove macros and some of the rarely-used features.

Not to downplay QBE, but the initial goal of QBE was to provide 90% of the performance in 10% of the code, until it was changed to 70%. You generally don't know how much of Rust (or anything else) is possible without actually trying.

I wonder how soon they will arrive at 80%/20%.

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