Me, I'm a Node.js guy, but that's in part because of my long history with JavaScript. I don't think I've ever been tempted to write anything in Dart, though there are some things I've written that would have been better to be written in GO (for deployment and memory use reasons). It really depends on your constraints, just like any other design decision.
What are your constraints? I suspect they're mostly around the availability of code and availability of learning resources.
What are your constraints? I suspect they're mostly around the availability of code and availability of learning resources.