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It's unfortunate that falsehoods spread so quickly. https://www.windowslatest.com/2025/12/24/microsoft-denies-rewriting-windows-11-using-ai-after-an-employees-

by p_ing 10mo ago

It's unfortunate that falsehoods spread so quickly. https://www.windowslatest.com/2025/12/24/microsoft-denies-rewriting-windows-11-using-ai-after-an-employees-one-engineer-one-month-one-million-code-post-on-linkedin-causes-outrage/ https://www.windowslatest.com/2025/12/24/microsoft-denies-re... > “It appears my post generated far more attention than I intended… with a lot of speculative reading between the lines.. Just to clarify… Windows is NOT being rewritten in Rust with AI. > My team’s project is a research project. [...]

rpgbr 10mo ago
I don’t believe for a second that it was a mistake. Probably got a call from some C-level and came up with this excuse.
- usefulcat 10mo ago
  Do you have any idea just how much code is in Windows? I did a quick search and estimates are in the 50-60 million lines range. No way in hell are they going to rewrite all that in a few years. Even if they actually wanted to, which they don't because it would be a truly enormous expense (even for Microsoft). Not to even mention that huge software projects have a well deserved reputation for failing, and the scope of such a rewrite would probably dwarf any previous rewrite of anything, ever, and by a very large margin. "Rewrite all of Windows in Rust" simply does not even begin to pass the sniff test.
  - 0cf8612b2e1e 10mo ago
    Good news, because part of the original post was that engineers should soon be able to handle a million lines of code a month. So 60 engineers to birth an OS in a month. … Our strategy is to combine AI *and* Algorithms to rewrite Microsoft’s largest codebases. Our North Star is “1 engineer, 1 month, 1 million lines of code,” Galen Hunt, who is a top-level Distinguished Engineer at Microsoft, wrote in a now-edited LinkedIn post.… Maybe he did not say Windows, but it is not a leap to imagine it falls under the umbrella of “largest codebases”

by p_ing 10mo ago

rpgbr 10mo ago

I don’t believe for a second that it was a mistake. Probably got a call from some C-level and came up with this excuse.

usefulcat 10mo ago
Do you have any idea just how much code is in Windows? I did a quick search and estimates are in the 50-60 million lines range. No way in hell are they going to rewrite all that in a few years. Even if they actually wanted to, which they don't because it would be a truly enormous expense (even for Microsoft). Not to even mention that huge software projects have a well deserved reputation for failing, and the scope of such a rewrite would probably dwarf any previous rewrite of anything, ever, and by a very large margin. "Rewrite all of Windows in Rust" simply does not even begin to pass the sniff test.
- 0cf8612b2e1e 10mo ago
  Good news, because part of the original post was that engineers should soon be able to handle a million lines of code a month. So 60 engineers to birth an OS in a month. … Our strategy is to combine AI *and* Algorithms to rewrite Microsoft’s largest codebases. Our North Star is “1 engineer, 1 month, 1 million lines of code,” Galen Hunt, who is a top-level Distinguished Engineer at Microsoft, wrote in a now-edited LinkedIn post.… Maybe he did not say Windows, but it is not a leap to imagine it falls under the umbrella of “largest codebases”