DHH Moves Hey Backend to Rust, Cutting Infrastructure to 10 Servers

2 articles · Updated · heise online · Sep 26

At Rails World, David Heinemeier Hansson said the next Hey version will drop Ruby on Rails entirely, with a Rust backend and native clients replacing the classic web app.
Hansson framed the shift around agent-driven development and performance, saying his team now works only with coding agents and that the new backend needs just 10 servers for redundancy.
The announcement jolted a conference of about 1,000 Rails developers because the Rails creator had long championed Ruby and recently still criticized Rust publicly.
He did not declare Rails dead, saying the framework will keep being maintained, but argued that English prompts and coding agents now matter more than language aesthetics.