Microsoft Goes All-in on Rust for Core Infrastructure and Much More

I recently wrote about Mark Russinovich, Microsoft’s Azure CTO, talking about how Rust code is shipping in Windows, but I didn’t cover the whole of what he said at RustConf 2025 earlier this month in Seattle. In fact, I didn’t even cover the half.

While I wrote primarily about Microsoft rewriting Windows components in Rust, that was just the opening act for Russinovich in his keynote at the event. He spent much of his talk showing off projects that reveal how far down the Rust rabbit hole Microsoft has actually gone.

Virtual Machines in…