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The article doesn't mention the other side of the tradeoff, which is that features like Rust's traits or macros make the language more expressive. Given that Rust's LSP server is pretty snappy, these features don't seem to cause problem in practice for incremental compilation.

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The author is the former lead developer of the Rust's LSP server, so it seems natural to have a preference for languages that would allow him to do a better job. Slow compilation (including incremental) is one of the most common complaints about Rust, despite a lot of effort spent on optimizations there. I think it would be good if more people are aware of the inherent downsides of maximizing expressiveness.

Rust compilation is actually very fast if you keep things Java-esque : No macros, no monomorphization (every Trait dyn). Obviously most the ecosystem isn't built that way, leaning more on the metaprogramming style because the language makes it so convenient.

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