That's just one dimension of "good" though, every language has its own pitfalls, some more than others. Go has pitfalls, sure, but the language it was designed

That's just one dimension of "good" though, every language has its own pitfalls, some more than others. Go has pitfalls, sure, but the language it was designed to replace (C/C++) has more of them. And languages with no room for mistakes have their own issues, like readability or productivity, but I don't have any experience with those; what language(s) are you thinking of? I don't know it myself but Rust seems more "bolted down" when it comes to that aspect.