Comment by benatkin

Being able to choose a middle ground between development/debug builds and production builds is becoming increasingly important. This is especially true when developing in the browser, when often something appears to be slow in development mode but is fine in production mode.

WebAssembly and lightweight MicroVMs are enabling FaaS with real time code generation but the build toolchain makes it less appealing, when you don't want it to take half a minute to build or to be slow.