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If you're looking for a replacement for node, I'd take a much deeper look at Elixir/Erlang than Rust (first up at least). You get easy concurrency, full functional language, good libraries (Phoenix is a great web framework), stability etc. Rust looks super cool, but there are high-level languages which can also offer good web performance.

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This is true if you're agnostic to or prefer dynamic typing. If you're using Node, that's probably true, but at the high level I tend to think of Haskell, OCaml, F#, and Scala as the comparisons.

As someone who likes neither dynamic typing or Ruby's syntax, I do agree that Elixir looks very cool, and have considered it for jobs that favor development speed over compile-time correctness.

Not having a decent type system (dialyzer is slow and does not have parametric and bounded polymorphism) is a massive strike against Elixir.

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