> An advantage of Go over Rust is easier tooling due to a simpler language

I'm curious how "tooling" is easier in Go than in Rust. To my mind, dynamic tooling (instrumentation, profiling, debugging, etc.) is much easier in Rust than in Go, because Rust uses the OS facilities and looks much like native code, while Go's runtime reinvents the world.

This is in fact what we've seen—Rust didn't have to write custom profilers, custom debuggers, language-specific race detectors, and so on, because the native system tools work just fine.

(NB: I'm not saying Go made the wrong decision with a userland scheduler; I'm objecting to the idea that it's somehow simpler to do that. It's much more complex.)