Years ago, I played with the idea: https://github.com/danneu/klobb https://github.com/danneu/klobb I went on to implement it in Swift (https://github.com/danne

Years ago, I played with the idea: https://github.com/danneu/klobb https://github.com/danneu/klobb I went on to implement it in Swift (https://github.com/danneu/hansel https://github.com/danneu/hansel) and then seriously improved on it in Kotlin (https://github.com/danneu/kog https://github.com/danneu/kog). It was fun but hard to really make a convincing upgrade to Koa once you consider the rest of the ecosystem. For example, since Koa exposes Node's req/res, then you can still use existing Node/Express middleware.