I say ecosystem to mean the majority of packages. That's the ecosystem.

Go's development process is fairly open and democratic though; if enough people flag it up, and if a case can be made for stack traces, it can be added.

As it stands though, the consensus is that it doesn't add enough value, it's too expensive (cost/benefit), errors are normal program flow, and 3rd party libraries can add the functionality if one decides they need/want it in their application.