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Quoting Mitchell Hashimoto: Programming Languages Are Now Fungible

Summary

Mitchell Hashimoto observes that programming languages no longer lock in a tech stack, citing Bun's week-long port from Zig to Rust as evidence of fungibility.

Quoting Mitchell Hashimoto: Programming Languages Are Now Fungible
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A quote from Mitchell Hashimoto

Simon Willison’s Weblog

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14th May 2026

[...] On the interesting side is how fungible programming languages are nowadays. Programming languages used to be LOCK IN, and they're increasingly not so. You think the Bun rewrite in Rust is good for Rust? Bun has shown they can be in probably any language they want in roughly a week or two. Rust is expendable. Its useful until its not then it can be thrown out. That's interesting!

— Mitchell Hashimoto, on Bun porting from Zig to Rust

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This is a quotation collected by Simon Willison, posted on 14th May 2026.

ai 2021

rust 108

zig 11

generative-ai 1788

llms 1754

mitchell-hashimoto 9

bun 5

agentic-engineering 51

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Key points and analysis

Article intelligence

EngineersIntermediate

Key points

  • Programming languages are increasingly fungible, not a lock-in.
  • Bun demonstrated it can rewrite in any language within a week or two.
  • Languages like Rust are expendable—useful until they aren't.

Highlights and analysis are generated automatically and may contain errors. Check the original source.