Comment by klabb3

I don’t know the details but reading the article they got this right. It’s been my main gripe with Rust which imo totally botched it. Or rather, they botched the ergonomics. Rust still allows low level control just fine… (but so does a plain old explicit event loop). Go did much better, succeeding at ergonomics but failing at low level control (failed successfully that is, it was never a goal).

The trick to retaining ergonomics and low level control is precisely to create a second layer, a ”runtime” layer, which is responsible for scheduling higher level tasks, IO and IPC. This isn’t easy, but it’s the only way. Otherwise you get an interoperability problem that the coloring and ecosystem fragmentation in Rust reflects.