[jen20]

> The Go default implementation also uses split stacks or something for its goroutines

This has not been true since Go 1.2, back in late 2013.

[zozbot234]

The fact remains that you need a separate implementation (cgo) if you want to do FFI. It might be something else goroutine-related that blocks FFI in the default Go implementation, but the issue is still there either way.

[throwaway894345]

What do you mean "a separate implementation"? CGo is part of Go, it's not another implementation of Go.

[surrealize]

Separate in the "CGo is not Go" sense.

[preseinger]

FFI isn't important. It's a niche feature for a superminority of use cases.