They do come and go. 90% of a language&#x27;s success is legacy apps that use it and can&#x27;t switch off. The other 10% is how powerful the hype train is for getting new apps written in it, which then form that language&#x27;s own 90%. Rust can actually get that done. The community has the power, and they have the hype. It&#x27;s <i>happening</i>.